Which of the following structures forms part of the integumentary system?

Correct Answer: B

Rationale: The correct answer is B: Epidermis. The integumentary system consists of the skin and its appendages, including the epidermis, which is the outermost layer of the skin. It serves as a protective barrier against external factors. The other choices are incorrect because: A: Myocardium is part of the cardiovascular system, not the integumentary system. C: Lymphatic glands are part of the lymphatic system, responsible for immune function, not the integumentary system. D: Cartilage is a type of connective tissue found in joints and other structures, but it is not a part of the integumentary system.

Correct Answer: D

Rationale: The correct answer is D because all the other choices mention specific skin diseases that fall under the broader category of common skin diseases. Eczema, psoriasis, acne (A), melanoma, basal cell carcinoma, squamous cell carcinoma (B), and warts, herpes, shingles (C) are all prevalent skin conditions that affect many individuals. By selecting choice D, you encompass all the mentioned skin diseases, providing a comprehensive overview of common skin conditions.

Correct Answer: C

Rationale: The correct answer is C: The distance between the patient and caregivers. This is important in radiation safety as increasing distance reduces radiation exposure. As radiation intensity decreases with distance, keeping a safe distance minimizes the risk of radiation exposure for the nurse. Options A and B are irrelevant to radiation safety. Option D, using a barrier, is not as effective as increasing distance in reducing radiation exposure.

Correct Answer: A

Rationale: The correct answer is A because using a heating pad can worsen PAD by dilating blood vessels, leading to reduced blood flow. Step 1: Heating pad increases blood flow, potentially worsening PAD symptoms. Step 2: Choices B, C, and D promote proper self-management by avoiding leg crossing, wearing warm socks for circulation, and quitting smoking to improve blood flow.

Correct Answer: C

Rationale: The correct answer is C: In stratum malpighi. Melanoblasts are responsible for producing melanin, the pigment that gives skin its color. They are located in the stratum malpighi layer of the epidermis, where they transfer melanin to nearby keratinocytes. Choice A is incorrect because the stratum corneum is the outermost layer of the epidermis composed of dead cells. Choice B is incorrect as the dermis is a layer of skin beneath the epidermis. Choice D is incorrect because melanoblasts are located in the stratum malpighi, not at the junction of epidermis and dermis.