Question 1

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

Accepted Answer

Lymph nodes

Question 2

The epidermis is primarily composed of which type of tissue?

Accepted Answer

Keratinized stratified squamous epithelium

Question 3

Which layer of the skin is responsible for shock absorption and insulation?

Accepted Answer

Hypodermis (subcutaneous layer)

Question 4

A patient presents with a burn that is red, swollen, and painful but does not blister. Which degree of burn does this most likely represent?

Accepted Answer

First-degree burn

Question 5

Which of the following best describes the function of melanocytes in the epidermis?

Accepted Answer

They produce melanin to protect DNA from UV radiation.

Question 6

Which of the following statements about the stratum corneum is TRUE?

Accepted Answer

It consists of 20-30 layers of dead, keratinized cells.

Question 7

A surgeon makes an incision parallel to the cleavage (tension) lines of the skin. What is the expected benefit of this approach?

Accepted Answer

Faster healing and less scarring

Question 8

Which pigment is primarily responsible for the yellow-orange color seen in the palms and soles of some individuals?

Accepted Answer

Carotene

Question 9

A patient with a genetic defect in keratin production would most likely experience which of the following symptoms?

Accepted Answer

Increased risk of dehydration due to loss of waterproof barrier

Question 10

Which of the following best explains why third-degree burns are often not painful?

Accepted Answer

They destroy both the epidermis and dermis, including nerve endings.

Question 11

Which gland is responsible for producing a watery secretion that helps regulate body temperature?

Accepted Answer

Eccrine (merocrine) sweat gland

Question 12

A 45-year-old male presents with a rapidly growing, irregularly pigmented skin lesion. According to the ABCD rule, which feature is most concerning for melanoma?

Accepted Answer

Diameter greater than 6 mm

Question 13

Which of the following is a function of the skin that involves the conversion of cholesterol to a hormone precursor?

Accepted Answer

Synthesis of vitamin D

Question 14

Which of the following substances can penetrate the skin's physical barrier most easily?

Accepted Answer

Lipid-soluble substances

Question 15

A patient with a deficiency in folic acid is at increased risk for which of the following, especially when exposed to excessive sunlight?

Accepted Answer

Impaired DNA synthesis

Question 16

Which of the following best describes the role of dendritic (Langerhans) cells in the epidermis?

Accepted Answer

They activate the immune system by presenting antigens to white blood cells.

Question 17

If a person loses approximately 90 scalp hairs per day, what is the total number of hairs lost in a non-leap year? Use the equation $$	ext{Total hairs lost} = 	ext{hairs lost per day} 	imes 365.$$

Accepted Answer

$$32,850$$

Question 18

Which of the following is a characteristic of apocrine sweat glands?

Accepted Answer

They secrete a viscous, milky fluid that can lead to body odor.

Question 19

A patient with a genetic mutation causing nonfunctional desmosomes in the epidermis would most likely experience which of the following?

Accepted Answer

Increased risk of skin tearing and blistering

Question 20

Which of the following is a metabolic function of the skin?

Accepted Answer

Synthesis of collagenase to aid in collagen turnover

Chapter 5: The Integumentary System – Structure and Function

Study Guide - Practice Questions

Study Guide - Flashcards