Question 1

Which layer of the skin is primarily responsible for the production of keratin and contains the most abundant epithelial cells?

Accepted Answer

Stratum granulosum

Question 2

A patient presents with a bluish tint to their skin after exposure to extreme cold. What is the physiological basis for this change in skin color?

Accepted Answer

Decreased blood flow and oxygenation, leading to cyanosis

Question 3

Which of the following structures anchors the epidermis to the dermis and is essential for the formation of a strong bond between these layers?

Accepted Answer

Hemidesmosomes

Question 4

What is the main function of the eccrine (merocrine) sweat glands?

Accepted Answer

Cool the surface of the skin and regulate body temperature

Question 5

Which pigment is responsible for protecting the skin from ultraviolet (UV) radiation and is produced by melanocytes?

Accepted Answer

Melanin

Question 6

A cut made parallel to a tension (cleavage) line in the dermis will:

Accepted Answer

Remain shut and heal well

Question 7

Which layer of the skin contains capillaries, lymphatic vessels, and sensory neurons, and is named for its projections between epidermal ridges?

Accepted Answer

Papillary layer

Question 8

What is the correct sequence of layers in thick skin from the basement membrane to the free surface?

Accepted Answer

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

Question 9

Which of the following is a function of the integumentary system?

Accepted Answer

Synthesis of vitamin D$_3$

Question 10

A patient with Addison's disease may show increased skin pigmentation. This is due to:

Accepted Answer

Excess ACTH stimulating melanocytes

Question 11

Which structure is primarily responsible for the storage of lipids and is the site for subcutaneous injections?

Accepted Answer

Subcutaneous (hypodermis) layer

Question 12

What is the role of epidermal growth factor (EGF) in skin physiology?

Accepted Answer

Promotes division of basal cells and stimulates epidermal repair

Question 13

Which type of gland produces a lipid secretion that lubricates and protects the hair shaft?

Accepted Answer

Sebaceous gland

Question 14

A person with a deficiency in vitamin D$_3$ synthesis is most likely to develop which condition?

Accepted Answer

Rickets

Question 15

Which cells in the stratum spinosum are active in the immune response?

Accepted Answer

Dendritic (Langerhans) cells

Question 16

During the repair of the integument after injury, which cells are responsible for producing granulation tissue?

Accepted Answer

Fibroblasts and endothelial cells

Question 17

Which of the following changes is NOT typically associated with aging of the skin?

Accepted Answer

Melanocyte activity declines

Question 18

Which anatomical structure of the nail is responsible for its growth and is located very close to the bone?

Accepted Answer

Nail root

Question 19

Which type of hair is soft, fine, and covers most of the body surface?

Accepted Answer

Vellus hair

Question 20

A patient presents with yellowing of the skin and eyes. Which condition is most likely responsible?

Accepted Answer

Jaundice

The Integumentary System: Structure and Function

Study Guide - Practice Questions