Question 1

Which of the following best describes the primary function of melanin in the integumentary system?

Accepted Answer

To protect underlying tissues from ultraviolet (UV) radiation

Question 2

A patient presents with a deep cut on the palm of their hand. Which layer of the epidermis is unique to this region and would be affected?

Accepted Answer

Stratum lucidum

Question 3

Which of the following statements about the hypodermis is correct?

Accepted Answer

It stabilizes the position of the skin relative to underlying tissues

Question 4

A surgeon wants to minimize scarring when making an incision. According to the structure of the dermis, how should the incision be made?

Accepted Answer

Parallel to tension lines

Question 5

Which of the following best explains why individuals with albinism have very light skin?

Accepted Answer

Their melanocytes are incapable of producing melanin

Question 6

Which of the following is a function of eccrine sweat glands?

Accepted Answer

Cooling the skin surface to reduce body temperature

Question 7

A child with a vitamin D3 deficiency develops rickets. Which step in the vitamin D3 pathway is most likely impaired if the child receives little sunlight and has a poor diet?

Accepted Answer

Production of cholecalciferol in the skin

Question 8

Which of the following structures is responsible for the formation of fingerprints?

Accepted Answer

Dermal papillae interlocking with epidermal ridges

Question 9

Which of the following best describes the process of keratinization?

Accepted Answer

The movement and transformation of keratinocytes from the stratum basale to the stratum corneum

Question 10

A patient has a bacterial infection in the skin that is spreading rapidly. Which cell type in the epidermis is most likely to initiate an immune response?

Accepted Answer

Dendritic (Langerhans) cells

Question 11

Which of the following is true regarding the difference between thick and thin skin?

Accepted Answer

Thick skin contains a stratum lucidum, while thin skin does not

Question 12

Which of the following best describes the role of sebaceous glands?

Accepted Answer

They discharge sebum into hair follicles to lubricate and protect hair

Question 13

A person consumes large amounts of carrots and notices their skin turning orange. Which pigment is responsible for this change?

Accepted Answer

Carotene

Question 14

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

Accepted Answer

Production of red blood cells

Question 15

Which layer of the epidermis contains stem cells that divide to produce new keratinocytes?

Accepted Answer

Stratum basale

Question 16

Which of the following best explains why superficial layers of the epidermis in light-skinned individuals lack pigmentation?

Accepted Answer

Melanosomes are destroyed by lysosomes as keratinocytes move superficially

Question 17

Which of the following is a correct sequence for the production and activation of vitamin D3?

Accepted Answer

$$	ext{Cholecalciferol (skin)} ightarrow 	ext{Calcifediol (liver)} ightarrow 	ext{Calcitriol (kidney)}$$

Question 18

Which of the following structures is NOT considered an accessory structure of the integumentary system?

Accepted Answer

Papillary layer

Question 19

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

Accepted Answer

Contracts to cause hairs to stand up, producing 'goose bumps'

Question 20

A patient has a painful, itchy rash after exposure to poison ivy. Which layer of the skin is primarily affected in dermatitis?

Accepted Answer

Papillary layer of the dermis

Chapter 5: The Integumentary System – Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards