Question 1

Which layer of the skin is primarily responsible for synthesizing vitamin D$$_3$$ when exposed to sunlight?

Accepted Answer

Epidermis

Question 2

A patient presents with a third-degree burn. Which of the following statements best describes the extent of tissue damage?

Accepted Answer

The epidermis and dermis are destroyed, possibly extending into the hypodermis, and sensory nerves are lost.

Question 3

Which of the following is NOT a general function of the integumentary system?

Accepted Answer

Production of red blood cells

Question 4

A person with pale skin after exposure to cold is experiencing which physiological response?

Accepted Answer

Constriction of superficial blood vessels in the dermis

Question 5

Which structure is NOT considered part of the cutaneous membrane?

Accepted Answer

Hypodermis

Question 6

Which type of gland is responsible for producing a secretion that inhibits bacterial growth and lubricates hair?

Accepted Answer

Sebaceous gland

Question 7

A patient with a deficiency in vitamin D$$_3$$ absorption is likely to experience which of the following symptoms?

Accepted Answer

Weak and flexible bones due to poor calcium and phosphorus absorption

Question 8

Which layer of the epidermis contains stem cells that continually divide to replace cells lost at the surface?

Accepted Answer

Stratum basale

Question 9

Which pigment is responsible for the orange-yellow coloration in the skin and is obtained from foods like carrots and squash?

Accepted Answer

Carotene

Question 10

During the repair of the integument, which phase involves the formation of granulation tissue composed of a blood clot, fibroblasts, and an extensive capillary network?

Accepted Answer

Migratory phase

Question 11

Which of the following best explains why elderly individuals are more prone to skin infections?

Accepted Answer

Reduced activity of stem cells and macrophages in the skin

Question 12

Which of the following is a function of hair in the integumentary system?

Accepted Answer

Protection from UV light and insulation for the skull

Question 13

Which type of sweat gland is most numerous and is responsible for cooling the body through evaporation?

Accepted Answer

Eccrine (merocrine) sweat gland

Question 14

A patient presents with cyanosis. What is the underlying cause of this bluish coloration of the skin?

Accepted Answer

Decreased oxygen supply to the skin

Question 15

Which layer of the dermis contains areolar tissue and supports and nourishes the epidermis?

Accepted Answer

Papillary layer

Question 16

Which of the following best describes the process of keratinization in hair formation?

Accepted Answer

Hair cells become filled with keratin and die as they move toward the surface

Question 17

Which of the following is a plausible consequence of reduced glandular secretions in aging skin?

Accepted Answer

Dry and scaly skin

Question 18

Which of the following best describes the role of desmosomes in the stratum corneum?

Accepted Answer

They tightly connect dead cells, causing them to be shed in groups or sheets

Question 19

Which accessory structure of the integumentary system is responsible for protecting the dorsal surfaces of the tips of fingers and toes?

Accepted Answer

Nails

Question 20

A patient has a blocked sebaceous duct resulting in inflammation and a raised 'pimple.' What is the most likely diagnosis?

Accepted Answer

Acne

The Integumentary System: Structure and Function

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