ATI RN
Questions on the Integumentary System Questions
Question 1 of 5
One of the following is NOT a gland found in the integument. Which one?
Correct Answer: C
Rationale: Sudiferous (sweat), mammary (milk), and sebaceous (sebum) glands are integumentary, located in the skin or derived from it. The pineal gland, in the brain, secretes melatonin and isn't part of the skin or integumentary system. Its endocrine role contrasts with the exocrine functions of skin glands, excluding it from the integument, making it the correct non-integumentary choice.
Question 2 of 5
The sweat produced by eccrine sweat glands is primarily composed of:
Correct Answer: A
Rationale: Eccrine sweat glands produce sweat mainly of water and electrolytes (e.g., sodium, chloride), secreted to the skin surface for cooling and minor waste excretion. Sebum, an oily lipid mix, is from sebaceous glands. Melanin is a pigment, not in sweat. Blood plasma, while fluid, contains proteins and cells not found in eccrine sweat, which is filtered and simpler. This watery, salty composition enables evaporative cooling, distinguishing eccrine sweat's role in thermoregulation, making it the correct answer.
Question 3 of 5
Which layer of the skin is responsible for producing new skin cells through cell division?
Correct Answer: A
Rationale: The epidermis produces new skin cells via mitosis in the stratum basale, where keratinocytes divide to replenish the upper layers, eventually forming the stratum corneum. The dermis supports with connective tissue and glands, not cell generation. The hypodermis (subcutaneous tissue) provides fat and anchoring, not new cells. The epidermis's regenerative capacity, driven by basal stem cells, sustains skin renewal, making it the correct layer.
Question 4 of 5
What is the primary role of the stratum basale in the epidermis?
Correct Answer: B
Rationale: The stratum basale, the deepest epidermal layer, produces new skin cells via mitosis of basal keratinocytes, regenerating the epidermis as cells move up and keratinize. Sensation involves dermal receptors, temperature regulation uses sweat and vessels, and sebum secretion is from dermal glands, not the basale. Its role as the proliferative base, sustaining skin renewal, makes it the correct primary function.
Question 5 of 5
The skin's ability to regenerate and repair itself is primarily attributed to the presence of which cells?
Correct Answer: B
Rationale: Fibroblasts in the dermis produce collagen and extracellular matrix during wound healing, driving repair and regeneration by rebuilding tissue post-injury. Melanocytes make melanin, not repair tissue. Macrophages clear debris and fight infection, aiding but not leading regeneration. Adipocytes store fat, not regenerate skin. Fibroblasts' role in scar formation and dermal restoration is central to skin repair, making them the key cells.