Question 1

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

Accepted Answer

It provides a water-resistant barrier and consists of multiple layers of dead, keratinized cells.

Question 2

A patient presents with a bluish tint to their skin (cyanosis). Which physiological change is most likely responsible for this appearance?

Accepted Answer

Decreased oxygenation of hemoglobin in the blood.

Question 3

Which layer of the dermis is primarily responsible for the skin’s strength and elasticity, and what fibers are most abundant there?

Accepted Answer

Reticular layer; collagen and elastic fibers

Question 4

A surgical incision is made parallel to a tension (cleavage) line in the skin. What is the expected outcome compared to a perpendicular incision?

Accepted Answer

The wound will heal well and remain closed, minimizing scarring.

Question 5

Which of the following best explains why dark-skinned individuals are less likely to develop skin cancer from UV exposure?

Accepted Answer

They have larger and more numerous melanosomes that provide greater protection against DNA damage.

Question 6

Which gland is responsible for producing a secretion that lubricates hair and inhibits bacterial growth, and what is the name of this secretion?

Accepted Answer

Sebaceous gland; sebum

Question 7

A child with a vitamin D$$_3$$ deficiency is at risk for which condition, and what is the physiological reason?

Accepted Answer

Rickets; impaired absorption of calcium and phosphate ions

Question 8

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

Accepted Answer

Bleeding, clot formation, inflammation, granulation tissue formation, scar tissue production

Question 9

Which of the following best describes the function of the arrector pili muscle?

Accepted Answer

It contracts to cause hair to stand up, producing 'goose bumps'.

Question 10

A patient has a burn that affects the entire epidermis and part of the dermis. According to the classification of burns by thickness, what type of burn is this?

Accepted Answer

Second-degree (partial-thickness) burn

Question 11

Which of the following statements about the subcutaneous (hypodermis) layer is correct?

Accepted Answer

It stabilizes the position of the skin and contains large arteries and veins.

Question 12

Which of the following best explains the difference between insensible and sensible perspiration?

Accepted Answer

Insensible perspiration is water loss by diffusion across the stratum corneum, while sensible perspiration is water excreted by sweat glands.

Question 13

A mutation causes a person to lack tactile (Merkel) cells in their skin. Which function would be most directly impaired?

Accepted Answer

Detection of light touch in hairless skin

Question 14

Which of the following is a function of eccrine (merocrine) sweat glands?

Accepted Answer

Cooling the surface of the skin to reduce body temperature

Question 15

Which pigment is responsible for the orange-yellow coloration in the skin and can be converted to vitamin A?

Accepted Answer

Carotene

Question 16

A patient with Addison’s disease develops a bronze skin tone. What is the underlying mechanism?

Accepted Answer

Increased secretion of ACTH stimulates melanocytes to produce more melanin.

Question 17

Which of the following best describes the process of keratinization?

Accepted Answer

The production of protective layers of cells filled with keratin.

Question 18

Which structure in the skin is responsible for detecting deep pressure and vibration?

Accepted Answer

Lamellar (Pacinian) corpuscles

Question 19

A person with a genetic defect in collagen synthesis would most likely experience which of the following skin problems?

Accepted Answer

Reduced flexibility and increased risk of tissue damage

Question 20

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

Accepted Answer

Epidermis thickens

Chapter 5: The Integumentary System – Structured Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards