Question 1

Which of the following best describes the primary function of hair in mammals?

Accepted Answer

To offer protection, sensory input, and assist in thermoregulation

Question 2

Which structural protein is most abundant in both hair and nails?

Accepted Answer

Keratin

Question 3

A patient presents with brittle nails and dry, flaky skin. Which accessory structure is most likely malfunctioning?

Accepted Answer

Sebaceous glands

Question 4

Which of the following best summarizes the composition of sebum?

Accepted Answer

A lipid-rich substance containing triglycerides, wax esters, and free fatty acids

Question 5

Which gland is primarily responsible for thermoregulation through evaporative cooling?

Accepted Answer

Eccrine sweat gland

Question 6

A person with a genetic mutation that prevents the production of keratin would most likely experience which of the following symptoms?

Accepted Answer

Weak, easily damaged hair and nails

Question 7

Which of the following statements about apocrine sweat glands is correct?

Accepted Answer

They become active at puberty and are associated with body odor

Question 8

Which of the following best explains why nails grow continuously throughout life?

Accepted Answer

The nail matrix contains actively dividing cells that push the nail forward

Question 9

A patient with blocked sebaceous glands is most likely to develop which condition?

Accepted Answer

Acne

Question 10

Which of the following equations best represents the process of evaporative cooling by sweat?

Accepted Answer

$$Q = mL$$

Question 11

Which of the following is NOT a function of sebum?

Accepted Answer

Facilitating heat loss through evaporation

Question 12

Which structure is responsible for the sensation of hair movement?

Accepted Answer

Hair follicle nerve endings

Question 13

Which of the following best describes the difference between eccrine and apocrine sweat glands?

Accepted Answer

Eccrine glands are involved in thermoregulation, while apocrine glands are associated with scent

Question 14

Which of the following is a direct consequence of the loss of sebaceous gland function?

Accepted Answer

Increased risk of dehydration due to loss of water barrier

Question 15

Which of the following best describes the composition of sweat produced by eccrine glands?

Accepted Answer

A dilute solution of water, salts, and metabolic wastes

Accessory Structures of the Integument: Hair, Nails, and Glands

Study Guide - Practice Questions