ATI RN
Questions About the Integumentary System Questions
Question 1 of 5
Which of the following statements is INCORRECT?
Correct Answer: A
Rationale: Sudiferous glands are sweat glands (eccrine and apocrine), secreting sweat, not sebum, which is an oily substance produced by sebaceous glands. Sebaceous glands correctly secrete oil (sebum) to lubricate skin and hair. Apocrine glands, a type of sudiferous gland, secrete sweat into hair follicles. Ceruminous glands in the ear canal secrete cerumen (earwax). The incorrect statement is that sudiferous glands secrete sebum, as their function is sweat production, a distinction clear in skin physiology, making this the error to identify.
Question 2 of 5
Three functions of the skin are to:
Correct Answer: D
Rationale: Skin functions include producing melanin (via melanocytes) for UV protection, secreting sebum (via sebaceous glands) to lubricate, and minimizing water loss via the stratum corneum's barrier. Storing fat occurs in the hypodermis, not skin. Bile excretion is a liver function, not skin. Keratin production and immunity (via Langerhans cells) are true, but lymphocytes are made in lymphoid organs, not skin. The trio of melanin, sebum, and water retention reflects core integumentary roles, making this the accurate set.
Question 3 of 5
Which of the following lists layers of the integument in the order from most superficial first, to deep?
Correct Answer: B
Rationale: The integument includes the epidermis and dermis. The correct order is epidermis (outermost), then the dermis's papillary layer (superficial), followed by the reticular layer (deeper). Hypodermis isn't part of the integument. Listing dermis before epidermal layers reverses the order, and grouping corneum and germinativum within epidermis ignores the dermis's structure. The sequence epidermis, papillary, reticular accurately reflects the skin's layered anatomy from surface to depth.
Question 4 of 5
Which is the outermost layer of the skin?
Correct Answer: B
Rationale: The epidermis is the outermost skin layer, encompassing sublayers like the stratum corneum, serving as the body's primary barrier. The dermis lies beneath it, supporting with connective tissue and glands. The stratum lucidum is an epidermal sublayer below the corneum in thick skin. The reticular dermal layer is deep in the dermis. As the topmost structure, the epidermis literally 'over the dermis' is the correct outermost layer, per standard skin anatomy.
Question 5 of 5
Which of the following is NOT a function of the skin?
Correct Answer: A
Rationale: Skin waterproofs via the stratum corneum, produces vitamin D with UV exposure, and aids immunity via Langerhans cells, but fat storage occurs in the hypodermis (subcutaneous layer), not the integument (epidermis and dermis). The hypodermis's role in energy storage is distinct from skin functions, which focus on protection, synthesis, and sensation. Fat storage's exclusion from the integument proper, per anatomical definition, makes this the non-function.