ATI RN
Questions on the Integumentary System Questions
Question 1 of 5
In mammals, the scent glands may be modified-
Correct Answer: D
Rationale: The correct answer is D because in mammals, scent glands can be modified sudorific (sweat) glands and sebaceous (oil) glands. Sudorific glands produce sweat that can carry scent, while sebaceous glands secrete oily substances that can also contribute to scent communication. Mucous glands, as mentioned in option C, are not typically involved in scent production in mammals. Option A and B individually are not comprehensive enough to cover all types of scent gland modifications found in mammals. Thus, the correct answer is D as it includes both sudorific and sebaceous glands, which are commonly modified for scent production in mammals.
Question 2 of 5
While walking barefoot on the beach, Joe stepped on a thorn that penetrated through the sole of his foot to the dermis. How many layers of epidermis did the thorn penetrate?
Correct Answer: A
Rationale: The correct answer is A: 5. The thorn penetrated through the sole of Joe's foot to the dermis. The epidermis has 5 layers: stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum basale. As the thorn reached the dermis, it had to pass through all 5 layers of the epidermis. Therefore, the correct answer is 5. Summary: B: 2 - Incorrect, not enough layers penetrated. C: 0 - Incorrect, the thorn penetrated the epidermis. D: 4 - Incorrect, the thorn penetrated all 5 layers of the epidermis.
Question 3 of 5
If a fair-skinned person is sunburned, why does his or her skin turn red?
Correct Answer: D
Rationale: The correct answer is D: The blood flow to the skin increases. When a fair-skinned person is sunburned, the body increases blood flow to the affected area to help with healing. This increased blood flow causes the skin to appear red due to the dilation of blood vessels near the skin surface. Choices A, B, and C are incorrect because a decrease in blood supply, an increase in red melanocytes, or an increase in production of red pigments do not directly explain why the skin turns red after sunburn.
Question 4 of 5
Which of the following is a holocrine exocrine gland?
Correct Answer: D
Rationale: The correct answer is D: sebaceous gland. Sebaceous glands are holocrine glands, where entire cells are released with their secretions. The sebaceous glands produce sebum by the disintegration of entire cells, a characteristic of holocrine secretion. A: Merocrine glands release secretions through exocytosis, not by disintegration of cells. B: Ceruminous glands produce earwax and are classified as modified apocrine glands. C: Apocrine glands release secretions along with a part of the cell cytoplasm, not the entire cell.
Question 5 of 5
The two components of the integumentary system are the
Correct Answer: B
Rationale: The correct answer is B: cutaneous membrane and accessory structures. The integumentary system consists of the cutaneous membrane (skin) and accessory structures like hair, nails, and glands. The skin is the main component responsible for protection, sensation, and temperature regulation. The accessory structures support these functions. A: epidermis and superficial fascia - The epidermis is a layer of the skin, not a component of the integumentary system. Superficial fascia is a layer of connective tissue beneath the skin. C: cutaneous membrane and hypodermis - The hypodermis is a subcutaneous layer beneath the skin, not a component of the integumentary system. D: integument and hypodermis - The integument is another term for the skin, not a separate component. Hypodermis is not a component of the integumentary system.