Question 1

Which of the following best describes the main function of keratin produced by keratinocytes in the epidermis?

Accepted Answer

Keratin provides strength and resistance to mechanical stress in the epidermis.

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 layer of the epidermis is responsible for ongoing mitosis and production of new keratinocytes?

Accepted Answer

Stratum basale

Question 4

A burn patient has damage to the epidermis, dermis, and hypodermis, but does not initially feel pain in the affected area. Which type of burn does this patient most likely have?

Accepted Answer

Third-degree burn

Question 5

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

Accepted Answer

Contracting to cause piloerection (goosebumps)

Question 6

Which of the following best explains why topical steroid creams are effective when applied to the skin?

Accepted Answer

Steroids are nonpolar and can cross the lipid-based barrier of the epidermis.

Question 7

Which of the following is TRUE regarding the Rule of Nines for burn assessment?

Accepted Answer

The anterior trunk represents 18% of the total body surface area.

Question 8

A patient with albinism is at increased risk for which of the following complications?

Accepted Answer

Increased risk of keratinocyte DNA damage from UV radiation

Question 9

Which of the following glands is responsible for producing a thick, protein-rich sweat that is metabolized by bacteria to produce body odor?

Accepted Answer

Apocrine sweat gland

Question 10

Which of the following best describes the process by which the skin helps regulate body temperature when exposed to a hot environment?

Accepted Answer

Dilation of blood vessels and increased sweating

Question 11

A patient presents with a scaly plaque on the scalp that bleeds easily and has a history of chronic wounds. Which type of skin cancer is most likely?

Accepted Answer

Squamous cell carcinoma

Question 12

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 13

Which of the following best explains why individuals with darker skin living near the equator have an evolutionary advantage?

Accepted Answer

They are protected from excess vitamin D production due to increased melanin.

Question 14

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

Accepted Answer

Production of red blood cells

Question 15

A patient has a wound that only involves the epidermis. Which of the following best describes the expected healing process?

Accepted Answer

Rapid healing with no permanent damage

Question 16

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

Accepted Answer

Holocrine secretion

Question 17

Which of the following structures is responsible for the formation of fingerprints?

Accepted Answer

Dermal papillae forming dermal ridges

Question 18

A patient with a yellow-orange hue 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 describes the role of dendritic (Langerhans) cells in the epidermis?

Accepted Answer

They act as phagocytes to protect against pathogens.

Question 20

A patient is prescribed a hydrophobic medication in patch form. Which property of the epidermis allows this medication to be effective?

Accepted Answer

The presence of a lipid-based barrier that allows nonpolar substances to cross.

The Integumentary System: Structure, Function, and Clinical Relevance

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