Mucous glands are not found in the skin of mammals because-
Rationale:
Mucous glands are not found in the skin of mammals because skin is not slimy.
Mammalian skin serves primarily as a barrier and protective layer, lacking the moisture and mucus typically produced by mucous glands, which are more common in other organisms for lubrication and protection.
A: Skin does not respire. While respiration occurs in mammals, it does not relate to the presence of mucous glands in the skin.
C: Skin does not have vessels. The absence of mucous glands is unrelated to the presence or absence of blood vessels in the skin structure.
D: Outer skin is having strata of cells. The stratification of skin cells pertains to protection and does not necessitate the existence of mucous glands for skin function.
To obtain his compliance in meeting his nutritional needs you would like to know his caloric requirements so he would have a goal to aim for. A formula you might use to figure Mr. Baker’s caloric needs is that caloric requirements equal
Rationale:
Caloric requirements equal (25 X kg body wt) + (40 X % burned). This formula effectively incorporates both body weight and the percentage of calories burned, providing a comprehensive calculation for determining Mr. Baker's nutritional goals.
B: (4 X kg body wt) X % burned. This formula lacks the necessary components to accurately assess caloric needs, omitting crucial factors like the base caloric requirement linked to body weight.
C: (2 X kg body wt) X % burned. This choice provides an overly simplistic calculation that fails to account for essential metabolic rates, resulting in an inadequate estimate of caloric requirements.
D: 2000 + (2 X kg body wt X % burned). The fixed base of 2000 calories does not adapt to individual variations in metabolism, leading to potentially misleading caloric requirements for different individuals.
The highest concentration of merocrine sweat glands is found
Rationale:
The highest concentration of merocrine sweat glands is found on the palms of the hands. These glands are abundant in areas requiring precise temperature regulation and grip, which are crucial for the palms' functionality. Their distribution allows efficient cooling and moisture control, particularly in regions that experience high friction and temperature fluctuations due to physical activities.
A: on the chest. Sweat glands are present but not as concentrated as in other regions, limiting their effectiveness for temperature regulation on the chest area.
C: in the axillae. While apocrine glands thrive in the axillae, merocrine sweat glands are less concentrated, making this option less accurate for highest gland density.
D: on the upper back. Though sweat glands exist here, the density is lower compared to the palms, which are specialized for enhanced sweat production and cooling.
In teaching ambulance personnel to assist the depth of burn injury, they should understand that a fresh partial-thickness wound
Rationale:
A: has coagulated blood vessels in the wound. Fresh partial-thickness wounds typically do not present with coagulated blood vessels, as they are characterized by open skin and have intact blood supply.
C: is not very painful. Fresh partial-thickness wounds are often painful due to nerve endings being exposed, leading to significant discomfort and sensitivity in the affected area.
D: appears brown and leathery. This description applies more to full-thickness burns, while fresh partial-thickness wounds usually present with a moist and red appearance, indicating the skin is still intact to some extent.
Arrector pili muscles are-
Rationale:
Arrector pili muscles are involuntary. These muscles function automatically, causing hair to stand on end in response to cold or fear, without conscious control, which exemplifies their involuntary nature in the body's response mechanisms.
A: Voluntary These muscles operate without conscious control, meaning they cannot be intentionally contracted, which defines them as involuntary rather than voluntary in function.
B: Voluntary as well as involuntary This option misrepresents the nature of arrector pili muscles, which do not possess any voluntary control, making them exclusively involuntary muscles in their action.
D: None of the above This choice incorrectly suggests that arrector pili muscles do not fit into any classification, while they clearly align with involuntary muscle characteristics.
The 'prickle-cell layer' of the skin is -
Rationale:
Stratum spinosum. This layer, known as the 'prickle-cell layer', contains keratinocytes interconnected by desmosomes, providing structural integrity and resilience to the skin, contributing significantly to its protective role.
B: Stratum corneum. This outermost layer primarily consists of dead keratinized cells, lacking the intercellular connections that characterize the prickle-cell layer, thus serving a different protective function.
C: Stratum germinativum. This basal layer is responsible for cell division and the generation of new skin cells, differing fundamentally from the structural characteristics of the prickle-cell layer.
D: None of these. This option disregards the existence of the stratum spinosum, which accurately identifies the prickle-cell layer, making this choice invalid based on the provided options.
The innermost layer of epidermis in mammals is termed-
Rationale:
The innermost layer of epidermis in mammals is termed Stratum germinativum. This layer, also known as the basal layer, is crucial for producing new skin cells and houses melanocytes, which are responsible for skin pigmentation and protection against UV radiation.
A: Stratum granulosum This layer is situated above the stratum spinosum and plays a role in keratinization, but it is not the innermost layer of the epidermis.
B: Stratum lucidum Found only in thick skin, this layer lies above the stratum granulosum and contributes to the skin’s toughness, but it is not the deepest epidermal layer.
C: Stratum spinosum This layer sits above the stratum germinativum and is involved in providing strength and flexibility, but it does not serve as the innermost skin layer.
The objective of management of psoriasis is to
Rationale:
Inhibit epidermal proliferation.
The primary goal in managing psoriasis focuses on mitigating the excessive growth of skin cells that characterizes the condition. By inhibiting this proliferation, treatment effectively reduces plaque formation, alleviates symptoms, and improves the overall quality of life for patients.
A: Prevent infection. While preventing infection is vital for overall health, it does not address the core issue of psoriasis, which is the abnormal skin cell lifecycle.
B: Maintain fluid and electrolyte balance. This option pertains more to conditions like dehydration or kidney issues, rather than directly targeting the hallmark symptoms of psoriasis and its skin manifestations.
C: Reduce the pain. Although pain relief is important for patient comfort, it does not tackle the underlying cause of psoriasis, which is the rapid turnover of skin cells leading to lesions.
A patient with a second-degree burn has a greater risk for:
Rationale:
A patient with a second-degree burn has a greater risk for infection. This type of burn damages both the epidermis and dermis, compromising the skin's protective barrier, which heightens susceptibility to pathogens and subsequent infection.
A: Constipation. Burn injuries do not directly affect gastrointestinal motility or function, making constipation an unlikely risk factor associated with second-degree burns.
C: Hypotension. While severe burns can lead to fluid loss, second-degree burns typically do not cause significant blood pressure drops, so hypotension remains an uncommon concern.
D: Hyperglycemia. Second-degree burns do not inherently affect glucose metabolism, making hyperglycemia an unrelated complication in most cases of such burns.
________ are fine hairs that lack pigment and cover much of the body surface.
Rationale:
Vellus hairs are fine hairs that lack pigment and cover much of the body surface. These soft, short hairs are typically unnoticeable and provide minimal insulation or protection compared to other hair types.
A: Velvet hairs refer to a specific texture rather than a hair type, often describing the soft, plush feel of certain fabrics, not human body hair.
B: Follicular hairs denote hair follicles rather than a specific type of hair, missing the distinct characteristics of fine, unpigmented hairs found on the body's surface.
D: Terminal hairs are thicker, longer, and pigmented, commonly found on the scalp and other areas, contrasting sharply with the fine, colorless nature of vellus hairs.
When staging a pressure ulcer, a stage II ulcer is recognized as:
Rationale:
Shallow ulcer with reddened base. Stage II pressure ulcers present as open wounds that involve the epidermis and part of the dermis, characterized by a shallow depth and redness at the base, indicating tissue damage.
A: Redness, with no break in the skin. This describes stage I pressure ulcers, which do not involve any skin loss or deeper tissue damage, merely presenting as non-blanchable redness.
C: Dermis involvement with eschar. This description aligns more with stage III or IV ulcers, which involve deeper tissue layers and may include necrotic tissue, rather than the shallow nature of stage II.
D: Bone visible with no drainage. This scenario is representative of stage IV ulcers, where extensive tissue damage exposes bone, indicating severe injury far beyond the scope of stage II classification.
What is a reasonable option for pain management for a 50-year-old man who has just sustained 20% partial-thickness burns to his right leg and abdomen?
Rationale:
Fentanyl 50 µg intravenously provides rapid pain relief, essential for managing acute pain in a 50-year-old man with significant burns. Its potency and quick onset make it ideal for severe burn injuries, ensuring effective comfort and care during treatment.
B: Morphine sulfate 10 mg IM into the left deltoid lacks the rapid action needed for immediate pain relief in acute burn situations, potentially delaying necessary comfort for the patient.
C: Calm, reassuring words to help relax him may provide some psychological comfort but do not address the physical pain caused by burns, which requires pharmacological intervention for effective management.
D: Oxycodone 10 mg PO is not suitable for immediate pain management in an acute setting, as oral medications take longer to take effect compared to intravenous options like fentanyl.
What is the most common skin cancer and has pearly borders?
Rationale:
Basal cell carcinoma is the most common skin cancer and features pearly borders. This type of cancer arises from the basal cells in the skin and is characterized by its distinct, shiny appearance, often resembling a pearl, which helps in its identification and diagnosis by healthcare professionals.
A: Actinic keratosis presents as rough, scaly patches on sun-exposed skin, indicating potential precancerous stages rather than the typical features of a skin cancer with pearly borders.
C: Malignant melanoma, while serious and aggressive, is known for its dark pigmentation and irregular shapes rather than the specific pearly borders characteristic of basal cell carcinoma.
D: Squamous cell carcinoma typically manifests as red, scaly patches or ulcers and lacks the distinct pearly border presentation that defines basal cell carcinoma, differentiating the two skin conditions.
Sex libido is provoked by
Rationale:
Sex libido is provoked by perineal glands. The perineal glands play a significant role in sexual arousal by secreting substances that influence libido. This glandular activity is essential for sexual function, making it a primary contributor to heightened sexual desire and response, unlike the functions of other glands mentioned in the options.
B: Sebaceous glands Secretion from sebaceous glands primarily focuses on skin lubrication and does not specifically influence sexual arousal or libido. Their role is largely unrelated to sexual desire.
C: Sweat glands While sweat glands are involved in regulating body temperature and can contribute to pheromone release, they do not directly provoke sexual libido or desire in the way perineal glands do.
D: All of the above Asserting all glands contribute to libido overlooks the specific and unique function of perineal glands in sexual arousal, rendering this choice inaccurate.
A client with psoriasis is feeling distressed as the condition has no known cure. Which of the following actions from the nurse can help the client accept the condition?
Rationale:
Encouraging the client to join a psoriasis support group can help them accept their condition. This fosters connection with others who share similar experiences, promoting understanding and emotional resilience, which is crucial for coping with chronic illnesses like psoriasis.
B: Recommend dermabrasion. This procedure may improve skin appearance but does not address emotional acceptance or provide the necessary support for dealing with a chronic condition.
C: Apply anthralin. While this topical treatment can manage symptoms, it does not facilitate emotional acceptance or provide the social support needed for coping with psoriasis.
D: Recommend a skin graft. This invasive option is primarily for severe cases and does not offer emotional support or help the client come to terms with their chronic condition.
Which conclusion is made by a nurse who admits a client receiving patient-controlled analgesia (PCA) after surgery?
Rationale:
The client is able to self-administer pain-relieving drugs as necessary. This conclusion is based on the understanding that patient-controlled analgesia (PCA) allows patients to manage their own pain relief, promoting autonomy and timely administration of medication based on individual needs.
B: The amount of medication received is determined entirely by the client. While the client controls administration, healthcare professionals set limits to ensure safety and prevent overdose.
C: The amount of drug used for analgesia fluctuates greatly over a given period. PCA provides a consistent means for pain management, allowing the client to adjust dosage based on their immediate needs rather than resulting in significant fluctuations.
D: Self-administration relieves the nurse of monitoring the client for pain relief. Nurses must continuously assess the client's pain levels and overall condition, ensuring effective pain management and patient safety remain priorities.
Milk is produced by ________ glands.
Rationale:
Milk is produced by mammary glands.
Mammary glands are specialized organs found in mammals that produce milk to nourish infants. They develop during pregnancy and are essential for lactation, providing vital nutrients and antibodies for newborns.
A: sebaceous Glands that secrete oil to lubricate skin and hair, not involved in milk production. Their primary role is to maintain skin health and prevent dryness.
B: ceruminous Glands that produce earwax, serving to protect the ear canal. They have no function related to milk production or infant nourishment in mammals.
D: eccrine sweat Sweat glands that primarily help regulate body temperature through perspiration. They are unrelated to the production of milk or any nutritional substances for offspring.
If the papilla of a hair follicle is destroyed,
Rationale:
If the papilla of a hair follicle is destroyed, the follicle will lose its blood supply. The papilla provides essential nutrients and signals for hair growth, so its destruction directly hinders the follicle's ability to function properly.
B: the color of the hair will become lighter. Hair color is determined by melanin production, which remains unaffected by the papilla's destruction, as the pigmentation process occurs independently.
C: hair production will not be affected. Hair production relies heavily on the papilla's blood supply and signaling; without it, the follicle cannot sustain hair growth effectively.
D: the hair produced by the follicle will change from terminal to vellus. The type of hair produced depends on the follicle's health and blood supply, both compromised if the papilla is destroyed.
If the epidermis, dermis, and part of hypodermis are burned, it is classified as
Rationale:
Full thickness. This classification indicates that the burn has affected the epidermis, dermis, and hypodermis, resulting in significant damage that may require extensive healing or surgical intervention.
B: second degree. This type involves damage to the epidermis and part of the dermis, characterized by blisters and pain, but does not extend to the hypodermis.
C: partial thickness. This classification only includes burns that affect the epidermis and a portion of the dermis, lacking the depth and severity present in a full thickness burn.
D: first degree. First degree burns involve only the epidermis, causing redness and pain without penetrating deeper layers like the dermis or hypodermis.
An elderly client with diabetes mellitus is taught how to care for the carbuncle on her foot and to prevent the spread of infection. What is the most important action to prevent the spread of infection?
Rationale:
Wash hands before and after applying a topical medication.
This action is crucial as it minimizes the risk of introducing pathogens into the wound and prevents cross-contamination. Regular hand hygiene significantly contributes to controlling the spread of infection, particularly in patients with diabetes who may have compromised healing abilities.
A: Cold wet soaks. While this may provide comfort, it does not effectively prevent the spread of infection as hand hygiene does.
B: Proper disposal of the soiled material. Although important, this action alone does not directly address the critical need for handwashing in infection prevention.
D: The use of an antiseptic solution to clean the wound. While helpful for cleaning, it does not replace the necessity of washing hands to avoid infection transmission.
Some bony prominences are cushioned by:
Rationale:
Adipose tissue in the subcutaneous layer cushions some bony prominences. This layer serves as an important protective padding, absorbing shock and providing insulation, which aids in maintaining overall body temperature and stability.
A: Adipose tissue in the dermis lacks the necessary thickness and cushioning properties to adequately protect bony prominences, as the dermis primarily supports skin structure rather than providing substantial padding.
B: Elastic connective tissue in the epidermis does not offer cushioning; rather, it provides flexibility and resilience to the skin's outer layer, which does not directly protect bony areas.
D: Elastic connective tissue in the subcutaneous layer contributes to flexibility but does not provide the essential cushioning needed for bony prominences, as adipose tissue is specifically designed for that purpose.
Which preparations form the mainstay of psoriasis treatment?
Rationale:
Tar preparations form the mainstay of psoriasis treatment. These preparations help reduce scaling, itching, and inflammation associated with psoriasis by slowing down skin cell turnover and alleviating symptoms effectively.
A: Antibiotics Target bacterial infections rather than addressing the underlying skin condition, making them unsuitable for treating psoriasis, which requires a different therapeutic approach focusing on skin cell management.
C: Antifungals Primarily treat fungal infections and do not address the pathophysiology of psoriasis, which is characterized by rapid skin cell proliferation, thereby lacking relevance in psoriasis management.
D: Scabicides Are formulated to eliminate scabies infestations and do not provide any therapeutic benefit for psoriasis, which necessitates treatments that specifically target skin cell behavior and inflammation.
All of the following are true of perspiration produced by merocrine sweat glands, except that it
Rationale:
Perspiration produced by merocrine sweat glands does not produce the body odor characteristic of 'sweating.'
This option is accurate because merocrine sweat primarily consists of water and electrolytes, lacking the organic compounds that contribute to body odor. Instead, it primarily functions to cool the body and maintain hydration, effectively preventing bacteria from thriving on the skin's surface.
B: helps to prevent bacteria from colonizing the skin. Merocrine sweat contains antimicrobial properties, aiding in the prevention of bacterial growth on the skin.
C: contains water and waste products. This type of sweat consists mainly of water, along with electrolytes and small waste products, serving essential physiological functions.
D: is mostly water. Merocrine sweat is predominantly composed of water, which plays a vital role in thermoregulation and hydration during sweating activities.
________ hairs are coarse pigmented hairs.
Rationale:
Terminal hairs are coarse pigmented hairs. Terminal hairs are characterized by their thickness and pigmentation, typically found on the scalp, face, and body. They develop during puberty and replace the finer vellus hairs, which are softer and lighter in color, highlighting the distinction between hair types based on texture and pigmentation.
A: Keratinous Keratinous refers to the protein structure of hair rather than its specific characteristics, such as coarseness or pigmentation. This term does not define the type of hair itself.
C: Follicular Follicular pertains to the hair follicle structure and does not specify the hair's texture or pigmentation. It describes the growth location rather than the hair type.
D: Dense Dense describes the concentration of hair rather than its specific characteristics like coarseness or pigmentation. This term fails to classify the hair type accurately.
A patient with a peptic ulcer who has an NG tube develops sudden severe upper abdominal pain, diaphoresis, and a very firm abdomen. Which action should the nurse take next?
Rationale:
Obtain the vital signs. Monitoring vital signs is crucial in this scenario as it helps assess the patient’s stability and determine if there is an acute surgical emergency that requires immediate intervention.
A: Irrigate the NG tube. While irrigation may alleviate some issues, it does not address the immediate concern of potential complications indicated by the patient’s symptoms.
C: Give the ordered antacid. Administering an antacid without first evaluating the patient's condition could mask serious underlying problems, delaying necessary treatment for possible perforation or other complications.
D: Listen for bowel sounds. Although assessing bowel sounds is important, it does not provide immediate information on the patient's critical condition or potential surgical emergency that needs urgent attention.
Which method for putting out flames is most effective and would be discussed by a nurse teaching campfire safety to a group of community members?
Rationale:
B: Log-roll the victim in the grass. This method minimizes the risk of spreading flames and extinguishes fire effectively by smothering it with the ground, making it a safe option in emergencies.
A: Slap at the flames. This action may inadvertently spread the fire and exacerbate the situation, leading to more severe burns and increased danger for the person involved.
C: Pour cold liquid over the flames. While it may seem helpful, pouring liquid can create steam or splatter, potentially causing burns to both the victim and the rescuer.
D: Remove the victim's burning clothes. This could worsen the burns by exposing more skin to flames and heat, and it may also ignite other nearby materials, increasing risks.
A patient with severe burn injuries to the abdomen and legs becomes combative when it is time to change the dressings. What nursing intervention will be most helpful to this patient?
Rationale:
Premedicating the patient with pain and anxiety medications before dressing change will effectively alleviate discomfort and help manage the patient's emotional response to the procedure. This approach prioritizes their comfort and cooperation during a painful experience.
A: Allow the patient to determine the time of dressing change. This may lead to delays in necessary care and increases the risk of infection or complications from untreated wounds.
C: Tell the patient it is OK to cry during the dressing change. While emotional support is important, this response does not address the underlying pain and anxiety associated with the procedure.
D: Explain the importance of dressing changes. Providing information alone does not alleviate pain or anxiety, which are critical factors contributing to the patient’s combative behavior during the procedure.
Which of the following mechanisms restores homeostasis during periods of raised body temperature?
Rationale:
B: Perspiration facilitates thermoregulation by promoting evaporative cooling from the skin surface, thereby effectively lowering body temperature during elevated thermal conditions. This process is crucial for maintaining homeostasis and preventing overheating.
A: Hypoventilation reduces respiratory rate, leading to increased carbon dioxide levels and potential overheating, rather than aiding in cooling the body during high temperatures.
C: Shivering generates heat through muscle contractions, counteracting temperature increases rather than promoting cooling mechanisms, thus failing to restore homeostasis in elevated temperature situations.
D: Piloerection causes hair to stand on end, primarily serving an insulating function rather than cooling, which is ineffective for temperature regulation during episodes of increased body heat.
The epidermis of the skin is made of:
Rationale:
Stratified squamous epithelium. The epidermis comprises multiple layers of cells that provide protection against environmental factors and prevent water loss, characteristic of stratified squamous epithelium's structure and function.
A: simple squamous epithelium This type consists of a single layer of flat cells, which does not provide the necessary thickness and protection required for the epidermis.
C: cuboidal epithelium Cuboidal epithelium features cube-shaped cells and is primarily found in glandular tissues, making it unsuitable for the protective role of the epidermis.
D: transitional epithelium Transitional epithelium is specialized for stretching, typically found in the bladder, and lacks the protective stratification necessary for the epidermis.
Pacinian corpuscles' are found in
Rationale:
Pacinian corpuscles are found in the skin. These specialized mechanoreceptors are located in the dermis and subcutaneous tissue, playing a crucial role in detecting deep pressure and vibration sensations.
B: Alimentary canal Lacks the specialized structure of Pacinian corpuscles, which are primarily designed for pressure and vibration detection, not for the sensory functions of the digestive system.
C: Liver This organ does not contain Pacinian corpuscles, as its function is primarily metabolic and detoxification, rather than sensory processing related to pressure or vibration.
D: Lungs Pacinian corpuscles are not present in the lungs, which are primarily involved in gas exchange and do not require these receptors for their sensory functions.
Mucous glands are not found in the skin of mammals because-
Rationale:
Mucous glands are not found in the skin of mammals because skin is not slimy.
Mammalian skin serves as a protective barrier, maintaining hydration and preventing bacterial invasion. Unlike amphibians, mammal skin lacks the moist, slimy surface that mucous glands provide, which is unnecessary for their primarily terrestrial lifestyle. The structure and function of mammalian skin adapt to different environmental requirements, making mucous glands redundant.
A: Skin does not respire. Mammalian skin plays a crucial role in gas exchange, though it is not primarily a respiratory organ, which does not negate the presence of mucous glands.
C: Skin does not have vessels. While skin contains blood vessels, this does not relate to the presence of mucous glands, which are more about moisture retention than vascularization.
D: Outer skin is having strata of cells. The stratified structure of mammalian skin aids in protection and barrier functions, but it does not inherently dictate the absence of mucous glands.
To obtain his compliance in meeting his nutritional needs you would like to know his caloric requirements so he would have a goal to aim for. A formula you might use to figure Mr. Baker’s caloric needs is that caloric requirements equal
Rationale:
To obtain his caloric requirements, the formula is (25 X kg body wt) + (40 X % burned). This equation accurately accounts for both body weight and energy expenditure, providing a comprehensive caloric goal for Mr. Baker.
B: (4 X kg body wt) X % burned. This formula lacks the necessary components to calculate total caloric needs, failing to incorporate a sufficient multiplier for body weight.
C: (2 X kg body wt) X % burned. This option significantly underestimates caloric needs by utilizing an insufficient coefficient for body weight, leading to an inaccurate caloric target.
D: 2000 + (2 X kg body wt X % burned). Although it includes a base caloric number, the multiplier for body weight is too low, resulting in an inadequate estimate of total requirements.
The highest concentration of merocrine sweat glands is found
Rationale:
B: The highest concentration of merocrine sweat glands is found on the palms of the hands. This area is particularly suited for thermoregulation and moisture control, featuring a dense network of these glands to maintain grip and comfort during various activities.
A: on the chest. The concentration of merocrine sweat glands is lower here compared to areas like the palms, which are specialized for sweat production and heat regulation.
C: in the axillae. While the axillae do contain sweat glands, apocrine glands predominate in this region, making it less relevant for merocrine sweat gland concentration.
D: on the upper back. Similar to the chest, the upper back has fewer merocrine sweat glands than the palms, which are more adept at managing perspiration and body temperature.
In teaching ambulance personnel to assist the depth of burn injury, they should understand that a fresh partial-thickness wound
Rationale:
Fresh partial-thickness wounds may have hairs in the wound that do not pull out easily. This characteristic indicates that the hair follicles are still intact, which helps differentiate these wounds from deeper injuries. Understanding this aspect is crucial for ambulance personnel assessing the severity of burn injuries.
A: has coagulated blood vessels in the wound. Coagulated blood vessels are more typical in full-thickness burns, where deeper tissue damage occurs, rather than in fresh partial-thickness wounds.
C: is not very painful. Fresh partial-thickness wounds are typically painful due to exposed nerve endings, making this option inaccurate for understanding the nature of such injuries.
D: appears brown and leathery. Brown and leathery appearances are indicative of full-thickness burns, while fresh partial-thickness wounds usually present as red or pink, highlighting the difference in injury severity.
Arrector pili muscles are-
Rationale:
Arrector pili muscles are involuntary. These small muscles are responsible for causing hair to stand upright in response to cold or fear, functioning automatically without conscious control, indicating their involuntary nature.
A: Voluntary These muscles operate without conscious effort, thus cannot be classified as voluntary, which requires deliberate muscle control. The involuntary aspect is crucial to their function in response to stimuli.
B: Voluntary as well as involuntary This option contradicts the established classification of arrector pili muscles; they solely function involuntarily. The presence of voluntary control is not applicable in their operational context.
D: None of the above This choice suggests that arrector pili muscles do not fit into any category, which is inaccurate. Their classification as involuntary is well-defined and recognized in anatomy.
The 'prickle-cell layer' of the skin is -
Rationale:
Stratum spinosum. This layer, also known as the prickle-cell layer, is situated above the stratum germinativum and is characterized by spiny projections from keratinocytes, contributing to the skin's structural integrity and resilience.
B: Stratum corneum This outermost layer consists of dead, flattened cells that provide a protective barrier but lacks the unique spiny appearance of the prickle-cell layer.
C: Stratum germinativum This basal layer is primarily involved in cell division and the generation of new skin cells, lacking the distinctive prickle-like projections that define the stratum spinosum.
D: None of these This option does not identify any specific layer of the skin, making it irrelevant when discussing the term 'prickle-cell layer'.
The innermost layer of epidermis in mammals is termed-
Rationale:
D: Stratum germinativum represents the deepest layer of the epidermis, where active cell division occurs. This layer is crucial for generating new skin cells, ensuring the epidermis remains healthy and replenished.
A: Stratum granulosum consists of flattened cells containing keratin, primarily involved in the process of keratinization, not the innermost layer of the epidermis.
B: Stratum lucidum is a thin, clear layer found only in thick skin, playing a role in protection rather than being the deepest epidermal layer.
C: Stratum spinosum, while significant for its strength and resilience, is situated above the stratum germinativum and does not represent the innermost layer of the epidermis.
The objective of management of psoriasis is to
Rationale:
To inhibit epidermal proliferation. This approach directly addresses the core issue of psoriasis, which involves rapid skin cell turnover. Effective management aims to reduce this excessive growth, leading to improved skin health and reduced symptoms.
A: prevent infection. While infections can occur in psoriasis patients, the primary goal of treatment focuses on controlling skin cell growth rather than solely preventing infections.
B: maintain fluid and electrolyte balance. Although important in various medical conditions, fluid and electrolyte balance is not a primary objective in managing psoriasis, which focuses on skin cell regulation.
C: reduce the pain. Pain management may be a secondary benefit, but the central aim of psoriasis treatment revolves around controlling the abnormal skin cell proliferation rather than addressing pain directly.
A patient with a second-degree burn has a greater risk for:
Rationale:
A patient with a second-degree burn has a greater risk for infection. Second-degree burns compromise the skin's protective barrier, allowing pathogens to enter the body more easily, which increases the likelihood of infection. Proper wound care is essential to minimize this risk and promote healing.
A: Constipation. The physiological stress from burns does not directly correlate with an increased likelihood of constipation, as bowel function is influenced by factors unrelated to burn severity.
C: Hypotension. While burns can affect blood pressure, second-degree burns typically do not lead to significant hypotension unless accompanied by extensive fluid loss or other severe injuries.
D: Hyperglycemia. Although stress can impact glucose levels, a second-degree burn does not inherently elevate blood sugar significantly compared to other acute conditions or injuries that cause metabolic changes.
________ are fine hairs that lack pigment and cover much of the body surface.
Rationale:
Vellus hairs are fine hairs that lack pigment and cover much of the body surface. These thin, short hairs are typically soft and barely noticeable, serving to provide warmth and sensory function to the skin without contributing to visible body hair.
A: Velvet hairs These are not a recognized category of hair types in human anatomy, lacking specific definition or function that aligns with the characteristics of vellus hairs.
B: Follicular hairs This term does not accurately describe the fine, unpigmented hairs, as it generally refers to the hair follicles rather than the hair itself.
D: Terminal hairs These are thicker, pigmented hairs found in specific areas like the scalp and armpits, contrasting with the light, fine nature of vellus hairs.
When staging a pressure ulcer, a stage II ulcer is recognized as:
Rationale:
A: Redness, with no break in the skin. This description pertains to an initial stage of pressure ulcers, typically categorized as stage I, where skin integrity is maintained without any breakdown.
C: Dermis involvement with eschar. This phrase suggests a more severe condition, likely indicating a stage III or IV ulcer, where deeper tissue layers are compromised and necrotic tissue is present.
D: Bone visible with no drainage. Visibility of bone indicates a stage IV pressure ulcer, where there is extensive tissue damage, including exposure of bone, which is far beyond stage II.
What is a reasonable option for pain management for a 50-year-old man who has just sustained 20% partial-thickness burns to his right leg and abdomen?
Rationale:
Fentanyl 50 µg intravenously is a reasonable option for pain management. This potent opioid analgesic provides rapid relief, essential for a patient experiencing significant pain from 20% partial-thickness burns, ensuring effective and swift treatment.
B: Morphine sulfate 10 mg IM into the left deltoid. Intramuscular administration is slower in onset compared to intravenous options, delaying pain relief when immediate intervention is crucial for burn patients.
C: Calm, reassuring words to help relax him. While supportive, verbal reassurance alone cannot adequately address the severe pain associated with extensive burns, necessitating pharmacological intervention for effective management.
D: Oxycodone 10 mg PO. Oral administration is inappropriate in this acute situation, as it lacks the rapid onset necessary for effective pain control in a patient with significant burn injuries.
What is the most common skin cancer and has pearly borders?
Rationale:
Basal cell carcinoma is the most common skin cancer and has pearly borders. This type of cancer typically appears as a small, shiny bump on sun-exposed skin, characterized by its distinctive, pearly appearance, making it easily identifiable among other skin lesions.
A: Actinic keratosis often presents as rough, scaly patches on sun-damaged skin, indicating precancerous changes rather than being a fully developed skin cancer like basal cell carcinoma.
C: Malignant melanoma is a serious skin cancer that usually appears as an irregularly shaped mole, lacking the pearly borders characteristic of basal cell carcinoma, thus distinguishing it from the correct answer.
D: Squamous cell carcinoma typically manifests as red, scaly patches or nodules, differing from the smooth, pearly appearance of basal cell carcinoma and indicating a separate type of skin cancer.
Sex libido is provoked by
Rationale:
Sex libido is provoked by perineal glands. The perineal glands play a significant role in sexual arousal by secreting pheromones and other substances that can stimulate libido, enhancing sexual attraction and desire.
B: Sebaceous glands Secrete oils primarily for skin health and do not directly influence sexual arousal or libido, making them unrelated to the stimulation of sexual desire.
C: Sweat glands Produce sweat for temperature regulation and do not have a direct function in enhancing sexual libido, thus lacking relevance in terms of sexual attraction.
D: All of the above Suggests that all glands contribute equally to libido, which misrepresents the specific role that perineal glands play in provoking sexual desire and attraction.
A client with psoriasis is feeling distressed as the condition has no known cure. Which of the following actions from the nurse can help the client accept the condition?
Rationale:
Encouraging the client to join a psoriasis support group can help them accept the condition. This action fosters a sense of community, allowing clients to share experiences, gain insights, and receive emotional support from others facing similar challenges, ultimately promoting coping strategies and resilience in managing their illness.
B: Recommend dermabrasion. This treatment focuses on skin appearance and does not address the emotional distress or acceptance of living with a chronic condition like psoriasis.
C: Apply anthralin. While anthralin can manage the symptoms of psoriasis, it does not provide emotional support or help the client come to terms with their diagnosis.
D: Recommend a skin graft. This invasive procedure is not a viable option for psoriasis management and fails to assist the client in accepting their chronic condition.
Which conclusion is made by a nurse who admits a client receiving patient-controlled analgesia (PCA) after surgery?
Rationale:
The client is able to self-administer pain-relieving drugs as necessary. This conclusion is based on the functionality of patient-controlled analgesia (PCA), which empowers patients to manage their pain by delivering doses of medication at their discretion, enhancing their control over pain management post-surgery.
B: The amount of medication received is determined entirely by the client. While the client controls administration, healthcare providers set limits to prevent overdose and ensure safety.
C: The amount of drug used for analgesia fluctuates greatly over a given period. PCA allows for individualized dosing, but it does not inherently create significant fluctuations in medication use.
D: Self-administration relieves the nurse of monitoring the client for pain relief. Nurses still need to monitor the client's pain levels and overall condition despite the PCA system's self-administration feature.
Milk is produced by ________ glands.
Rationale:
Milk is produced by mammary glands. Mammary glands are specialized organs in mammals that secrete milk to nourish infants. This unique function distinguishes them from other gland types, which serve different purposes in the body. Their primary role is crucial for the survival and development of young mammals, highlighting their evolutionary importance in reproduction and nurturing.
A: sebaceous These glands secrete sebum to lubricate skin and hair, playing a role in protecting against dryness and infection, not in milk production for offspring.
B: ceruminous These glands produce earwax, which protects the ear canal from debris and pathogens, unrelated to the function of producing milk for feeding young.
D: eccrine sweat These sweat glands are involved in thermoregulation through sweat secretion, which cools the body, serving a purpose distinct from the production of milk.
If the papilla of a hair follicle is destroyed,
Rationale:
If the papilla of a hair follicle is destroyed, the follicle will lose its blood supply. The papilla provides essential nutrients and blood flow necessary for hair growth, so its destruction directly impairs the follicle's ability to sustain hair production.
B: the color of the hair will become lighter. The hair color is determined by melanin production, which is not directly influenced by the papilla's structural integrity.
C: hair production will not be affected. Hair production heavily relies on the health and functionality of the papilla; its destruction ceases production entirely.
D: the hair produced by the follicle will change from terminal to vellus. The loss of the papilla results in hair production halting, preventing any type of hair growth from occurring.
If the epidermis, dermis, and part of hypodermis are burned, it is classified as
Rationale:
Full thickness. This classification indicates that the burn extends through the epidermis, dermis, and even part of the hypodermis, resulting in significant damage and potential loss of sensation in affected areas.
B: second degree. This type of burn affects the epidermis and part of the dermis, characterized by blisters and swelling, but does not involve the hypodermis.
C: partial thickness. This classification pertains to burns that only damage the epidermis and part of the dermis, leading to pain and redness, but not deeper tissues.
D: first degree. This burn type is limited to the epidermis, causing redness and minor pain without damaging deeper layers such as the dermis or hypodermis.
An elderly client with diabetes mellitus is taught how to care for the carbuncle on her foot and to prevent the spread of infection. What is the most important action to prevent the spread of infection?
Rationale:
Washing hands before and after applying a topical medication is crucial for preventing the spread of infection. This action eliminates harmful pathogens that may be transferred during the wound care process, ensuring a sterile environment and promoting healing.
A: Cold wet soaks. This method may provide temporary relief but does not effectively address the transmission of bacteria, which is vital for infection control.
B: Proper disposal of the soiled material. While important for hygiene, it does not directly prevent pathogens from entering the wound during application of treatment.
D: The use of an antiseptic solution to clean the wound. Although antiseptics are beneficial, they are secondary to maintaining hand hygiene, which directly impacts infection transmission.
Some bony prominences are cushioned by:
Rationale:
Adipose tissue in the subcutaneous layer cushions some bony prominences. This specialized tissue acts as a protective padding, absorbing shock and reducing friction between bones and external surfaces, enhancing mobility and comfort.
A: adipose tissue in the dermis. This option refers to a layer that primarily supports skin structure rather than providing cushioning for underlying bony prominences.
B: elastic connective tissue in the epidermis. The epidermis lacks significant cushioning properties; it mainly serves protective and sensory functions, without the necessary thickness or composition to cushion bones.
D: elastic connective tissue in the subcutaneous layer. While elastic connective tissue provides flexibility, it does not offer the necessary cushioning properties that adipose tissue uniquely provides for bony prominences.
Which preparations form the mainstay of psoriasis treatment?
Rationale:
Tar preparations are the mainstay of psoriasis treatment. These formulations work effectively by reducing scaling, inflammation, and itchiness, promoting skin healing and managing the symptoms associated with psoriasis, making them a cornerstone in therapy.
A: Antibiotics target bacterial infections, not the underlying inflammatory processes of psoriasis, making them unsuitable for treating this chronic skin condition effectively.
C: Antifungals focus on fungal infections, which do not address the immune-mediated mechanisms driving psoriasis, thus failing to provide necessary relief for affected individuals.
D: Scabicides are designed to eliminate scabies mites, not relevant to psoriasis pathology, rendering them ineffective for managing the symptoms or causes of this skin disorder.
All of the following are true of perspiration produced by merocrine sweat glands, except that it
Rationale:
Merocrine sweat glands do not produce body odor characteristic of 'sweating.' Instead, they primarily secrete a clear, odorless fluid that helps regulate body temperature through evaporation.
B: helps to prevent bacteria from colonizing the skin. This is a vital function of perspiration, as it maintains skin hydration and creates an environment that inhibits bacterial growth.
C: contains water and waste products. Merocrine sweat is composed mainly of water, electrolytes, and metabolic waste, facilitating thermoregulation and waste excretion.
D: is mostly water. The primary composition of merocrine sweat is indeed water, accounting for a significant portion of its total content, which aids in temperature regulation.
________ hairs are coarse pigmented hairs.
Rationale:
Terminal hairs are coarse pigmented hairs. Terminal hairs differ from other hair types due to their thickness, pigmentation, and presence in areas such as the scalp and facial regions, providing distinct characteristics that define them as terminal rather than fine or vellus hairs.
A: Keratinous Hairs made of keratin do not specifically refer to hair type or characteristics, failing to capture the unique qualities of terminal hairs compared to other hair types.
C: Follicular This term pertains to hair follicles rather than the specific characteristics of the hair itself, thus not addressing the distinctive nature of terminal hairs.
D: Dense While dense can describe hair density, it does not specifically indicate the coarseness or pigmentation that defines terminal hairs, rendering it an insufficient descriptor.
A patient with a peptic ulcer who has an NG tube develops sudden severe upper abdominal pain, diaphoresis, and a very firm abdomen. Which action should the nurse take next?
Rationale:
B: The nurse should obtain the vital signs next. This is crucial as the sudden severe abdominal pain, diaphoresis, and rigidity indicate potential complications, necessitating immediate assessment of the patient's stability and condition.
A: Irrigate the NG tube would not address the acute symptoms and could delay critical assessments needed to determine the patient's status.
C: Giving the ordered antacid may alleviate symptoms but does not prioritize immediate evaluation of the patient’s serious condition, which requires urgent attention.
D: Listening for bowel sounds is a secondary assessment that will not provide immediate insight into the patient's critical state, making it less urgent than obtaining vital signs.
Which method for putting out flames is most effective and would be discussed by a nurse teaching campfire safety to a group of community members?
Rationale:
B: Log-roll the victim in the grass. This technique effectively smothers flames by depriving them of oxygen and simultaneously protects the victim’s skin from further burns, making it a vital safety measure.
A: Slap at the flames. Attempting to slap the flames may spread them further and lacks the control needed to extinguish a fire safely and efficiently.
C: Pour cold liquid over the flames. While pouring cold liquid might seem helpful, it can potentially spread the flames if the liquid is not applied correctly, posing additional risks.
D: Remove the victim's burning clothes. This action may aggravate the situation, as it can expose more skin to flames and does not effectively address the immediate danger of the fire.
A patient with severe burn injuries to the abdomen and legs becomes combative when it is time to change the dressings. What nursing intervention will be most helpful to this patient?
Rationale:
Premedicating the patient with pain and anxiety medications before dressing change is most helpful. This intervention directly addresses the patient's physical discomfort and emotional distress, promoting a more manageable experience during the painful procedure associated with severe burn injuries.
A: Allow the patient to determine the time of dressing change. This approach may lead to delays in necessary care and could exacerbate the patient’s anxiety regarding the procedure.
C: Tell the patient it is OK to cry during the dressing change. While offering emotional support is essential, this statement does not alleviate the physical pain or anxiety associated with the procedure.
D: Explain the importance of dressing changes. Providing information is beneficial, yet it does not address the immediate needs for pain management and anxiety reduction that the patient is experiencing.
Which of the following mechanisms restores homeostasis during periods of raised body temperature?
Rationale:
Perspiration effectively restores homeostasis during periods of raised body temperature. Through the process of sweating, the body cools itself by evaporative cooling, helping to maintain a stable internal temperature despite external heat increases.
A: Hypoventilation Reduces breathing rates, which can lead to increased body temperature rather than cooling, thus failing to assist in thermoregulation during elevated temperatures and potentially exacerbating heat stress.
C: Shivering Activates muscle contractions to generate heat, making it counterproductive when the body is already overheated, as it contributes to further temperature elevation instead of facilitating cooling.
D: Piloerection Causes hair to stand on end, which is a response primarily for insulation in cold conditions, not for cooling, and does not aid in reducing body temperature.
The epidermis of the skin is made of:
Rationale:
The epidermis of the skin is made of stratified squamous epithelium. This type of epithelial tissue consists of multiple layers of cells, providing durability and protection against environmental hazards, such as pathogens and physical abrasion, essential for maintaining skin integrity.
A: simple squamous epithelium This type of epithelium features a single layer of flat cells, which is unsuitable for the protective function required in the epidermis of the skin.
C: cuboidal epithelium Cuboidal epithelium consists of cube-shaped cells and is typically found in glandular tissues, lacking the layered structure necessary for effective protection in the skin's outermost layer.
D: transitional epithelium Transitional epithelium is specialized for stretching and is primarily found in the urinary bladder, making it ill-suited for the epidermis, which requires a different structural configuration.
Pacinian corpuscles' are found in
Rationale:
Pacinian corpuscles are found in skin. These specialized mechanoreceptors are embedded in the dermis, allowing them to detect deep pressure and vibration, which plays a crucial role in tactile sensation.
B: Alimentary canal Lacks the specialized structure of Pacinian corpuscles, which are tailored for pressure and vibration detection, not suitable for the sensory functions of the digestive system.
C: Liver Contains a different type of sensory and structural architecture, primarily focused on metabolic functions rather than the mechanoreceptive qualities attributed to Pacinian corpuscles in the skin.
D: Lungs Primarily involved in gas exchange, the lungs do not house Pacinian corpuscles, as their functions do not relate to pressure and vibration sensitivity found in the skin.