Question 1

Which of the following best explains why the stratum basale is essential for the continual renewal of the epidermis?

Accepted Answer

It is the only layer where keratinocytes are actively dividing, providing new cells to replace those shed at the surface.

Question 2

A patient presents with a bluish coloration of the skin (cyanosis) after a severe asthma attack. Which physiological change most directly causes this symptom?

Accepted Answer

Reduced oxygenation of hemoglobin in the dermal blood vessels

Question 3

Which of the following is a primary function of the subcutaneous layer (hypodermis)?

Accepted Answer

Anchoring the skin to underlying tissues and providing insulation through adipose tissue

Question 4

A surgeon plans to make an incision on a patient’s back. To minimize scarring, the incision should be made:

Accepted Answer

Parallel to the tension lines of the skin

Question 5

Which of the following best describes the process by which the skin produces vitamin D$$_3$$?

Accepted Answer

Epidermal cells synthesize cholecalciferol (vitamin D$$_3) $$when exposed to UV radiation, which is then converted by the liver and kidneys to calcitriol.

Question 6

A patient with Addison’s disease develops a darker skin tone. This is primarily due to:

Accepted Answer

Increased secretion of adrenocorticotropic hormone (ACTH), which stimulates melanocytes

Question 7

Which of the following glands is responsible for producing a watery secretion that helps regulate body temperature and is widely distributed across the body surface?

Accepted Answer

Eccrine (merocrine) sweat glands

Question 8

A third-degree burn destroys the epidermis, dermis, and extends into the subcutaneous layer. Which of the following complications is LEAST likely to occur as a direct result?

Accepted Answer

Rapid regeneration of hair follicles

Question 9

Which of the following best explains why elderly individuals are more prone to overheating and skin infections?

Accepted Answer

Decreased glandular activity and reduced number of dendritic cells

Question 10

A person with albinism has very light skin and hair. Which of the following best explains this condition?

Accepted Answer

A genetic deficiency in melanin production by melanocytes

Question 11

Which of the following is a correct sequence of events during the repair of a deep skin wound?

Accepted Answer

Inflammatory phase → Migration phase → Proliferation phase → Scarring phase

Question 12

Which of the following best describes the role of keratin in the epidermis?

Accepted Answer

It forms a tough, water-resistant barrier that protects against abrasion and fluid loss.

Question 13

A patient presents with yellowing of the skin and eyes (jaundice). Which organ is most likely malfunctioning?

Accepted Answer

Liver

Question 14

Which of the following statements about hair growth is correct?

Accepted Answer

Hair growth begins at the hair matrix, and at the end of the growth cycle, the follicle becomes inactive and the hair is shed.

Question 15

Which of the following is a function of the papillary layer of the dermis?

Accepted Answer

Contains capillaries and sensory neurons that nourish and monitor the epidermis

Question 16

A patient has a wound that heals with a thick, raised scar covered by shiny, smooth epidermis. This is best described as:

Accepted Answer

A keloid

Question 17

Which of the following best describes the secretion and function of apocrine sweat glands?

Accepted Answer

They secrete a sticky, cloudy fluid into hair follicles, which can produce body odor when metabolized by bacteria.

Question 18

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

Accepted Answer

Regulation of blood glucose levels

Question 19

Which of the following best explains why thick skin (such as on the palms and soles) is more resistant to abrasion than thin skin?

Accepted Answer

It has an additional layer, the stratum lucidum, and a thicker stratum corneum.

Question 20

A person receives a subcutaneous injection. Which layer is the needle penetrating to deliver the medication?

Accepted Answer

Subcutaneous (hypodermis) layer

Chapter 5: The Integumentary System – Structured Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards