Question 1

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

Accepted Answer

It provides a durable, water-resistant barrier due to layers of dead, keratinized cells.

Question 2

A patient presents with a bluish tint to their lips and nail beds. Which condition is most likely responsible for this appearance?

Accepted Answer

Cyanosis

Question 3

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

Accepted Answer

Production of red blood cells

Question 4

A burn patient has damage to the epidermis, dermis, and hypodermis, but reports little pain at the site. Which type of burn is this most likely to be?

Accepted Answer

Third-degree burn

Question 5

Which layer of the skin is primarily responsible for anchoring the epidermis and providing blood supply to it?

Accepted Answer

Papillary layer of the dermis

Question 6

Which of the following best explains why the skin is able to act as a barrier to pathogens?

Accepted Answer

The continuous structure of keratinized stratified squamous epithelium and secretion of antimicrobial substances

Question 7

A surgeon is planning an incision along the trunk. To minimize scarring, the incision should be made:

Accepted Answer

Parallel to the tension (cleavage) lines

Question 8

Which of the following glands is responsible for producing a waxy substance that protects the tympanic membrane?

Accepted Answer

Ceruminous gland

Question 9

Which cell type in the epidermis is responsible for detecting light touch and differentiating shapes and textures?

Accepted Answer

Tactile (Merkel) cell

Question 10

A person with a genetic inability to produce tyrosinase will most likely exhibit which of the following?

Accepted Answer

Albinism and increased risk of UV-induced DNA damage

Question 11

Which of the following best describes the process of thermoregulation when body temperature rises above normal?

Accepted Answer

Dilation of blood vessels and increased sweating

Question 12

Which of the following is TRUE regarding the hypodermis?

Accepted Answer

It is not part of the skin and is composed of loose connective and adipose tissue.

Question 13

Which of the following best explains why calluses form on the hands of a manual laborer?

Accepted Answer

Increased mitosis in the stratum basale leads to additional layers of stratum corneum.

Question 14

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

Accepted Answer

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

Question 15

A patient with a large, ulcerated 'crater' on their skin is diagnosed with a cancer that rarely metastasizes and arises from the stratum basale. Which cancer is this?

Accepted Answer

Basal cell carcinoma

Question 16

Which of the following best describes the secretion method of sebaceous glands?

Accepted Answer

Holocrine secretion, releasing the product and cell fragments

Question 17

Which of the following is a function of melanin in the skin?

Accepted Answer

Shielding DNA from ultraviolet (UV) radiation

Question 18

A patient with a yellow-orange tint to their skin and the whites of their eyes is most likely experiencing an accumulation of which substance?

Accepted Answer

Bilirubin

Question 19

Which of the following best explains why third-degree burns are initially painless?

Accepted Answer

They destroy sensory nerve endings in the dermis and hypodermis.

Question 20

Which of the following is a correct description of the role of the arrector pili muscle?

Accepted Answer

It contracts to cause piloerection, resulting in 'goosebumps'.

The Integumentary System: Structure and Function

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