Question 1

Which layer of the epidermis is primarily responsible for mitosis and regeneration of new keratinocytes?

Accepted Answer

Stratum basale

Question 2

A patient presents with yellowing of the skin and sclera. Which pigment and underlying condition is most likely responsible for this clinical finding?

Accepted Answer

Bilirubin; liver disorder (jaundice)

Question 3

Which of the following best describes the function of the papillary layer of the dermis?

Accepted Answer

Forms dermal papillae that increase surface area for nutrient exchange and contain touch receptors

Question 4

A burn patient loses the ability to regulate body temperature and is at increased risk of dehydration. Which function of the skin has been compromised?

Accepted Answer

Barrier to water loss and thermoregulation

Question 5

Which cell type in the epidermis is responsible for immune defense against pathogens?

Accepted Answer

Dendritic (Langerhans) cell

Question 6

A patient with a genetic defect in keratin production would most likely have abnormalities in which layer of the epidermis?

Accepted Answer

Stratum spinosum

Question 7

Which of the following equations best represents the rate of epidermal cell loss in humans, given that humans shed about 50,000 cells every minute?

Accepted Answer

$$R = 50,000 	imes t$$

Question 8

Which structure is responsible for the formation of fingerprints?

Accepted Answer

Dermal papillae in the papillary layer

Question 9

A patient presents with stretch marks (striae) after rapid weight gain. Which layer of the skin is primarily affected?

Accepted Answer

Reticular layer of the dermis

Question 10

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

Accepted Answer

Production of red blood cells

Question 11

A patient with albinism lacks melanin production. Which enzyme is most likely deficient?

Accepted Answer

Tyrosinase

Question 12

Which layer of the epidermis is only found in thick skin, such as the palms and soles?

Accepted Answer

Stratum lucidum

Question 13

A patient with cyanosis presents with blue discoloration of the skin. Which of the following best explains this phenomenon?

Accepted Answer

Decreased oxygenation of hemoglobin

Question 14

Which of the following best describes the arrangement of collagen fibers in the reticular layer of the dermis?

Accepted Answer

Parallel bundles forming cleavage lines

Question 15

A patient with a blister has separation between which two layers of the skin?

Accepted Answer

Epidermis and dermis

Question 16

Which of the following best explains why the skin acts as a blood reservoir?

Accepted Answer

The dermis contains an extensive network of blood vessels that can hold up to 5% of the body's blood volume

Question 17

A patient with excessive sweating is experiencing increased activity in which skin appendage?

Accepted Answer

Sweat (sudoriferous) glands

Question 18

Which of the following is the correct order of layers in the epidermis from deepest to most superficial?

Accepted Answer

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

Question 19

A patient with a mutation causing defective desmosomes would most likely have issues in which layer of the epidermis?

Accepted Answer

Stratum spinosum

Question 20

If a person has a total skin surface area of $$2 \ m^2$ and sheds 50$$,000$$ epidermal cells per minute, how many cells are shed per hour per square meter?

Accepted Answer

$$1,500,000$$ cells per $$m^2$$ per hour

Study Notes: The Integumentary System (Anatomy & Physiology I)

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드