Question 1

Which of the following best describes the main function of the stratum corneum in the epidermis?

Accepted Answer

It acts as a barrier to water loss and protects against abrasion and penetration.

Question 2

A patient presents with yellowish skin and sclera. Which integumentary function is most likely impaired, and what is the probable underlying cause?

Accepted Answer

Metabolic function; liver disorder

Question 3

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

Accepted Answer

Production of red blood cells

Question 4

A person with a genetic defect causing a lack of keratin production would most likely experience which of the following symptoms?

Accepted Answer

Increased risk of dehydration due to water loss

Question 5

Which layer of the skin is primarily responsible for providing strength and elasticity due to its high content of collagen and elastic fibers?

Accepted Answer

Reticular layer of the dermis

Question 6

During a marathon, an athlete sweats profusely. Which type of gland is primarily responsible for this response, and what is the main component of the sweat produced?

Accepted Answer

Eccrine sweat gland; water

Question 7

A patient with a burn that destroys the epidermis and damages the dermis will likely experience which of the following complications?

Accepted Answer

Loss of sensation due to destruction of sensory receptors

Question 8

Which of the following best explains why the skin is considered a blood reservoir?

Accepted Answer

It contains a large volume of blood vessels that can be constricted to redirect blood to vital organs.

Question 9

A person with a mutation that prevents the formation of glycolipids in the stratum corneum would most likely have which of the following symptoms?

Accepted Answer

Increased water loss through the skin

Question 10

Which of the following is a correct sequence of the layers of the epidermis in thick skin, from superficial to deep?

Accepted Answer

Stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, stratum basale

Question 11

A patient with a genetic disorder affecting melanocyte function is most likely to experience which of the following?

Accepted Answer

Abnormal skin pigmentation

Question 12

Which of the following best describes the function of sebaceous glands?

Accepted Answer

They produce sebum to lubricate and waterproof the skin and hair.

Question 13

A person with a deficiency in vitamin D synthesis due to lack of sunlight exposure may develop which of the following conditions?

Accepted Answer

Rickets or osteomalacia due to impaired calcium absorption

Question 14

Which of the following is a function of the arrector pili muscle?

Accepted Answer

Contracts to cause hair to stand upright, producing 'goosebumps'

Question 15

A patient with a mutation that impairs the function of Langerhans (dendritic) cells in the epidermis would most likely have which of the following problems?

Accepted Answer

Decreased immune response to skin infections

Question 16

Which of the following best explains why the skin is able to act as a sensory organ?

Accepted Answer

It contains specialized receptors in the dermis that detect heat, cold, pain, and pressure.

Question 17

A patient with a large area of skin removed (such as after a severe burn) is at increased risk for which of the following? (Select the best answer)

Accepted Answer

Dehydration due to increased water loss

Question 18

Which of the following is a correct statement about the difference between eccrine and apocrine sweat glands?

Accepted Answer

Eccrine glands are primarily involved in thermoregulation and secrete a watery sweat, while apocrine glands secrete a thicker, milky sweat and are found mainly in axillary and anogenital areas.

Question 19

A patient presents with pale skin (pallor) and reports feeling faint. Which of the following is the most likely physiological explanation?

Accepted Answer

Constriction of dermal blood vessels reduces blood flow to the skin.

Question 20

Which of the following best explains why the skin is able to excrete certain wastes?

Accepted Answer

Sweat glands secrete small amounts of nitrogenous wastes such as urea, ammonia, and uric acid.

Integumentary System: Structure, Function, and Components

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