A nurse is teaching a client about the epidermis. Which of the following information should the nurse include?
The epidermis is composed of blood vessels.
The epidermis contains adipose tissue.
The epidermis is the deepest layer of skin.
The epidermis receives nutrition from the dermis.
The Correct Answer is D
The epidermis serves as the body’s primary stratified squamous barrier against environmental insults. Because this layer lacks direct vascularization, it relies entirely on the underlying connective tissue for the exchange of gases and nutrients, maintaining the viability of the basal keratinocyte layer through passive movement of molecules.
A. The epidermis is an avascular tissue layer, meaning it contains no blood vessels of its own. It consists primarily of keratinocytes, melanocytes, and Langerhans cells. If a scratch or injury draws blood, it indicates that the damage has reached the vascularized dermis beneath the epidermis.
B. Adipose tissue, or body fat, is primarily located in the hypodermis, also known as the subcutaneous layer. The epidermis is the thin, protective outer layer and does not contain fat cells; its primary function is protection and water retention rather than insulation or energy storage.
C. The epidermis is the most superficial layer of the skin, not the deepest. The skin is organized into the epidermis (outermost), the dermis (middle), and the hypodermis (deepest). The epidermis provides the first line of defense against pathogens, ultraviolet radiation, and mechanical trauma from the environment.
D. Since the epidermis is avascular, it must receive its oxygen and essential nutrients through diffusion from the capillary loops located in the papillary layer of the dermis. The basement membrane facilitates this nutrient exchange, which is vital for the constant regeneration of skin cells.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Asymmetrical shoulder height is a clinical indicator of lateral spinal curvature, commonly known as scoliosis, or potential neuromuscular imbalances. When an abnormality is identified during a general survey, the nurse must transition to a focused physical examination to determine the severity, evaluate for compensatory mechanisms, and gather objective data such as the presence of a rib hump during a forward bend test.
A. Conducting a focused musculoskeletal assessment is the priority action. This allows the nurse to gather more specific information, such as performing the Adam’s Forward Bend test to differentiate between structural and functional scoliosis. Identifying whether the asymmetry is associated with spinal rotation, limb length discrepancy, or muscular weakness is essential for clinical decision-making.
B. Attempting to reposition the client to "correct" their posture is an ineffective and potentially misleading intervention. If the asymmetry is caused by a structural skeletal deformity like scoliosis, the client cannot simply adjust their posture to eliminate the finding. This action ignores the underlying physiological cause and fails to assess the extent of the abnormality.
C. While the healthcare provider will eventually need to be notified of the findings, the nurse must first complete a focused assessment to provide a comprehensive and detailed report. Notifying the provider without having assessed the degree of curvature or associated symptoms like pain or respiratory restriction would be an incomplete nursing action.
D. Documenting the finding and continuing with the general assessment without further investigation is inappropriate. Asymmetry in a major skeletal landmark requires immediate diagnostic scrutiny to ensure that progressive conditions are identified early. Skipping the focused assessment misses a critical opportunity to evaluate the client’s functional and structural integrity.
Correct Answer is B
Explanation
Peripheral edema is the clinical manifestation of fluid accumulation in the intercellular interstitial spaces, often secondary to heart failure, renal dysfunction, or venous insufficiency. Assessment requires the application of manual pressure over a bony prominence to determine the presence and depth of "pitting" caused by fluid displacement.
A. Observing skin color can provide information about oxygenation, perfusion, or chronic venous stasis (such as hemosiderin staining), but it does not confirm the presence of edema. Edema is a volumetric and tactile finding involving fluid volume excess, which cannot be accurately quantified through visual inspection of pigmentation alone.
B. Compressing the skin for 5 seconds over a bony area, such as the medial malleolus, allows the nurse to evaluate the degree of pitting. This technique is the gold standard for grading edema on a scale of 1+ to 4+, providing a measurable indication of the severity of fluid retention.
C. Abdominal girth measurement is a specific intervention used to monitor ascites, which is fluid accumulation within the peritoneal cavity, rather than peripheral edema. While both involve fluid shifts, measuring the waistline does not provide diagnostic information regarding the localized swelling of the lower extremities or ankles.
D. Palpating the dorsalis pedis pulse assesses arterial patency and peripheral perfusion rather than fluid volume in the tissues. While severe edema can make pulses difficult to palpate, the act of feeling for a pulse is not a diagnostic method for identifying or grading the accumulation of interstitial fluid.
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