Question 1

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

Accepted Answer

Serves as the primary site of mitosis, producing new keratinocytes

Question 2

A patient presents with a burn that is red, swollen, and blistered, but does not involve the entire thickness of the skin. According to the classification of burns, what type of burn does this patient most likely have?

Accepted Answer

Second-degree burn

Question 3

Which pigment is responsible for the yellow to orange coloration of the skin, especially visible in the palms and soles, and can be converted to vitamin A?

Accepted Answer

Carotene

Question 4

A surgeon is planning an incision on a patient’s back. To minimize scarring and promote faster healing, the incision should be made:

Accepted Answer

Parallel to cleavage (tension) lines

Question 5

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

Accepted Answer

Contracts to cause 'goose bumps' in response to cold or fear

Question 6

A person with a genetic mutation resulting in nonfunctional tyrosinase would most likely exhibit which of the following symptoms?

Accepted Answer

Lack of melanin production, resulting in very light skin and hair

Question 7

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

Accepted Answer

They destroy nerve endings in the dermis, eliminating sensation

Question 8

Which of the following is NOT a function of sebum produced by sebaceous glands?

Accepted Answer

Regulates body temperature through evaporative cooling

Question 9

A patient presents with bluish discoloration of the skin and mucous membranes. Which of the following best explains this finding?

Accepted Answer

Low oxygenation of hemoglobin (cyanosis)

Question 10

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

Accepted Answer

Dermal papillae forming friction ridges in thick skin

Question 11

Which of the following best describes the method of secretion for eccrine sweat glands?

Accepted Answer

Merocrine secretion via exocytosis

Question 12

A 35-year-old woman develops coarse, terminal hair on her chin and chest. Which of the following is the most likely underlying cause?

Accepted Answer

Increased androgen production due to an adrenal or ovarian tumor

Question 13

Which of the following is a metabolic function of the skin?

Accepted Answer

Synthesis of vitamin D from cholesterol when exposed to UV light

Question 14

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

Accepted Answer

Dehydration and electrolyte imbalance

Question 15

Which of the following best describes the difference between thick and thin skin?

Accepted Answer

Thick skin contains all five epidermal layers, including the stratum lucidum

Question 16

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

Accepted Answer

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

Question 17

A patient is prescribed a transdermal patch for medication delivery. Which property of the skin allows certain drugs to be absorbed through the skin?

Accepted Answer

Lipid-soluble substances can penetrate the physical barrier of the stratum corneum

Question 18

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

Accepted Answer

Decreased subcutaneous fat and reduced elasticity of the skin

Question 19

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

Accepted Answer

Highly metastatic and resistant to chemotherapy

Question 20

A patient presents with yellowing of the skin and sclera. Which of the following is the most likely cause?

Accepted Answer

Liver dysfunction leading to jaundice

The Integumentary System: Structure, Function, and Clinical Aspects

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