$\text{Vitamin D}_3 \xrightarrow{\text{Liver}} \text{Calcidiol} \xrightarrow{\text{Kidney}} \text{Calcitriol}$

Question 1

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

Accepted Answer

Production of red blood cells

Question 2

A patient presents with a blue discoloration of the skin and mucous membranes. Which condition is most likely responsible for this symptom?

Accepted Answer

Cyanosis

Question 3

Which layer of the epidermis is responsible for the continuous production of new keratinocytes?

Accepted Answer

Stratum basale

Question 4

A surgeon makes an incision parallel to the tension lines of the skin. What is the expected outcome compared to a perpendicular incision?

Accepted Answer

The incision will heal faster and with less scarring.

Question 5

Which gland is primarily responsible for producing an oily secretion that helps prevent dehydration and bacterial growth?

Accepted Answer

Sebaceous gland

Question 6

A burn that destroys the epidermis, dermis, and extends into the hypodermis is classified as:

Accepted Answer

Third-degree burn

Question 7

Which of the following best describes the main tissue type found in the papillary layer of the dermis?

Accepted Answer

Areolar connective tissue

Question 8

A patient with Addison’s disease may present with which of the following skin changes?

Accepted Answer

Excess pigmentation due to increased melanin

Question 9

Which of the following statements about thick and thin skin is TRUE?

Accepted Answer

Thick skin is found on the palms and soles and contains a stratum lucidum.

Question 10

Which of the following is the correct sequence of events in tissue repair after a skin injury?

Accepted Answer

Blood clot formation → Inflammation → Granulation tissue formation → Regeneration

Question 11

Which of the following best explains why melanin is important for skin health?

Accepted Answer

It absorbs ultraviolet (UV) radiation, protecting DNA from damage.

Question 12

A patient presents with a rapidly growing, asymmetrical, darkly pigmented lesion with irregular borders. Which type of skin cancer is most likely?

Accepted Answer

Malignant melanoma

Question 13

Which of the following best describes the mechanism of secretion for apocrine glands?

Accepted Answer

Release of a small portion of the cytoplasm along with the secretion

Question 14

Which of the following equations correctly represents the conversion of vitamin D3 to its active form?

Accepted Answer

$	ext{Vitamin D}_3 \xrightarrow{	ext{Liver}} 	ext{Calcidiol} \xrightarrow{	ext{Kidney}} 	ext{Calcitriol}$

Question 15

A patient with a pituitary tumor is found to have darkened skin. What is the most likely explanation?

Accepted Answer

Increased production of melanin-stimulating hormone

Question 16

Which of the following best describes the difference between the papillary and reticular layers of the dermis?

Accepted Answer

The papillary layer contains blood vessels and sensory neurons, while the reticular layer contains dense bundles of collagen and elastic fibers.

Question 17

Which of the following is a plausible consequence of insufficient vitamin D3 production in the skin?

Accepted Answer

Development of rickets due to impaired bone mineralization

Question 18

Which of the following best explains why the hypodermis is NOT considered part of the integumentary system?

Accepted Answer

It lies deep to the dermis and primarily stores fat for energy.

Question 19

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

Accepted Answer

Keratin makes the skin water and abrasion resistant.

Question 20

A patient presents with irregular, patchy loss of skin color. Which condition is most likely responsible?

Accepted Answer

Vitiligo

The Integumentary System: Structure, Function, and Clinical Aspects

Study Guide - Practice Questions