Question 1

Which of the following is NOT a primary function of the skin?

Accepted Answer

Production of insulin

Question 2

The skin helps regulate body temperature primarily by which mechanism?

Accepted Answer

Sweat secretion and blood flow near the surface

Question 3

A patient presents with a deficiency in Vitamin D. Which function of the skin is most directly impaired?

Accepted Answer

Production of Vitamin D

Question 4

Which layer of the skin is primarily responsible for protection against water loss and physical abrasion?

Accepted Answer

Stratum corneum

Question 5

During exercise, why does the skin appear red?

Accepted Answer

Dilation of blood vessels allowing heat dissipation

Question 6

Which of the following best describes the role of melanocytes in the skin?

Accepted Answer

They produce melanin to protect against UV radiation

Question 7

If a surgeon makes an incision perpendicular to the lines of cleavage in the skin, what is the most likely outcome?

Accepted Answer

Slower healing and more scar tissue formation

Question 8

Which layer of the skin contains the papillary and reticular layers?

Accepted Answer

Dermis

Question 9

A patient develops a decubitus ulcer (bedsore) after prolonged immobility. What is the underlying cause?

Accepted Answer

Restricted blood supply to the skin

Question 10

Which of the following equations best represents the relationship between sweat production and body temperature regulation?

Accepted Answer

$$Q = m c \Delta T$$

Question 11

Which type of sweat gland is most abundant on the palms, soles, and forehead?

Accepted Answer

Eccrine (merocrine) sweat gland

Question 12

Apocrine sweat glands differ from eccrine sweat glands in that apocrine glands:

Accepted Answer

Produce sweat containing fatty substances and proteins

Question 13

Sebaceous glands are classified as holocrine glands because:

Accepted Answer

They release their product by bursting entire cells

Question 14

Which structure is responsible for making hair 'stand on end' during cold or fear?

Accepted Answer

Arrector pili muscle

Question 15

The texture of hair (curly, straight, wavy) is determined by:

Accepted Answer

The shape of the hair follicle opening

Question 16

Which part of the nail is responsible for producing heavily keratinized cells?

Accepted Answer

Nail matrix

Question 17

A person with lighter skin has:

Accepted Answer

The same number of melanocytes but less melanin produced

Question 18

Which layer attaches the dermis to underlying muscle or bone and stores nutrients?

Accepted Answer

Hypodermis (subcutaneous layer)

Question 19

Which of the following best explains why sweat is generally acidic?

Accepted Answer

It contains trace amounts of salts, vitamins, wastes, and dermcidin

Question 20

Which of the following is a real-life consequence of UV radiation damaging skin cell DNA?

Accepted Answer

Cells begin to divide uncontrollably, leading to skin cancer

Integumentary System: Structure and Function of the Skin and Its Appendages

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