Melanocytes give rise to the pigment melanin, which is responsible for skin color. Where can the melanocytes be found?
Loose connective tissue
Epidermis
Dermis
Superficial fascia
The Correct Answer is B
A. Loose connective tissue:
Melanocytes are not typically found in loose connective tissue. Their primary location is within the epidermis, specifically in the basal layer, where they interact with keratinocytes to produce melanin and contribute to skin color. Loose connective tissue contains collagen and elastin fibers, as well as fibroblasts, but it does not house melanocytes.
B. Epidermis:
This is the correct answer. Melanocytes are primarily located in the basal layer of the epidermis, which is the deepest layer of the epidermis. These cells produce melanin, a pigment that helps protect the skin from UV radiation and determines skin color. Melanocytes are interspersed among keratinocytes in the epidermis and transfer melanin to keratinocytes to provide skin pigmentation.
C. Dermis:
The dermis is the layer of skin beneath the epidermis and consists of connective tissue, blood vessels, nerves, hair follicles, and sweat glands. While the dermis plays a crucial role in supporting and nourishing the epidermis, melanocytes are not primarily located in the dermis. They are confined to the basal layer of the epidermis.
D. Superficial fascia:
The superficial fascia, also known as the subcutaneous tissue or hypodermis, lies beneath the dermis and consists of adipose (fat) tissue and connective tissue. It provides insulation, energy storage, and cushioning for underlying structures. However, melanocytes are not typically found in the superficial fascia. They are restricted to the epidermis, specifically the basal layer, where they carry out their function of melanin production.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Stage III pressure injury
Stage III pressure injuries involve full-thickness skin loss, extending into the subcutaneous tissue but not through the fascia. These wounds typically present as deep craters and may involve undermining or tunneling. Non-blanchable erythema alone without visible skin loss is not characteristic of a Stage III pressure injury.
B. Stage IV pressure injury
Stage IV pressure injuries are the most severe and involve full-thickness tissue loss with exposed bone, tendon, or muscle. These wounds often have extensive tissue damage and can be difficult to manage. Again, non-blanchable erythema without visible skin loss is not indicative of a Stage IV pressure injury.
C. Stage II pressure injury
Stage II pressure injuries involve partial-thickness skin loss with damage to the epidermis and possibly the dermis. These wounds often present as shallow open ulcers or blisters and may have characteristics such as intact or ruptured blisters. While Stage II injuries can present with erythema, non-blanchable erythema specifically indicates a Stage I injury.
D. Stage I pressure injury
Stage I pressure injuries are the earliest stage and involve non-blanchable erythema of intact skin. The skin may be warmer or cooler than surrounding tissue and may have changes in sensation. There is no visible skin loss at this stage, but the area is at risk for further injury if pressure is not relieved. Therefore, non-blanchable erythema on the heels most likely indicates a Stage I pressure injury.
Correct Answer is C
Explanation
A. "Bake or grill the meat rather than frying it."
This statement is more related to reducing fat intake rather than managing sodium levels. While reducing fried foods can be beneficial for overall health, it doesn't directly address the issue of sodium intake, which is crucial in managing hypernatremia.
B. “Check your radial pulse twice a day.”
Checking the radial pulse is a method used to monitor heart rate and rhythm. It is not directly related to managing sodium levels or hypernatremia. Although monitoring vital signs is important in general health care, it is not specific to addressing mild hypernatremia.
C. "Read food labels to determine sodium content."
This statement is the correct choice. Managing sodium intake is a key component in managing hypernatremia. Reading food labels helps patients identify high-sodium foods and make choices that are lower in sodium content, which can be crucial in preventing or managing mild hypernatremia.
D. “Weigh yourself every morning and every night."
While regular weight monitoring can be important for certain health conditions, it is not directly related to managing mild hypernatremia. Weight changes may occur with fluid retention or loss, but monitoring sodium intake and hydration status is more directly relevant to managing hypernatremia.
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