Question 1

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

Accepted Answer

It releases membrane-coated granules that form a water barrier for the skin.

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 TRUE regarding the hypodermis?

Accepted Answer

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

Question 4

A surgeon is planning an incision on the trunk. To minimize scarring and promote faster healing, the incision should be made:

Accepted Answer

Parallel to tension (cleavage) lines

Question 5

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 6

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

Accepted Answer

Contracting to cause piloerection, resulting in 'goosebumps'

Question 7

A patient with a third-degree burn is at greatest risk for which of the following complications?

Accepted Answer

Dehydration and infection due to loss of the skin barrier

Question 8

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

Accepted Answer

Thermoreceptors in the brain detect the change, and the hypothalamus stimulates sweating and vasodilation.

Question 9

Which of the following is the correct order of the epidermal strata from deepest to most superficial in thick skin?

Accepted Answer

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

Question 10

Which of the following glands is responsible for producing earwax?

Accepted Answer

Ceruminous gland

Question 11

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

Accepted Answer

Keratinocyte DNA damage from UV radiation

Question 12

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

Accepted Answer

They have increased melanin, which prevents excess vitamin D production and protects against UV damage.

Question 13

Which of the following is a distinguishing feature of malignant melanoma compared to other skin cancers?

Accepted Answer

It is characterized by asymmetrical shape, irregular borders, and evolving color and size.

Question 14

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

Accepted Answer

Holocrine secretion, where the cell ruptures and releases its contents

Question 15

A patient presents with a yellow-orange discoloration of the skin and sclera. Which substance is most likely elevated in their blood?

Accepted Answer

Bilirubin

Question 16

Which of the following best explains why thick skin lacks hair follicles?

Accepted Answer

Thick skin is subject to more mechanical stress and is adapted for protection rather than sensation.

Question 17

Which of the following is the primary function of eccrine sweat glands?

Accepted Answer

Thermoregulation through the release of watery sweat

Question 18

A patient with a burn covering the entire right arm and anterior trunk would have what percentage of body surface area affected, according to the Rule of Nines?

Accepted Answer

$$9\% + 18\% = 27\%$$

Question 19

Which of the following best describes the role of dendritic (Langerhans) cells in the epidermis?

Accepted Answer

They are phagocytes that protect the skin and deeper tissues from pathogens.

The Integumentary System: Structure, Function, and Clinical Relevance

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