Question 1

Which of the following best describes the main function of keratinization in the epidermis?

Accepted Answer

It hardens and waterproofs the outer layer of skin by accumulating keratin in cells.

Question 2

A patient presents with a burn that is red, painful, and swollen, but only affects the epidermis. Which type of burn does this patient most likely have?

Accepted Answer

Superficial partial-thickness (first-degree) burn

Question 3

Which layer of the skin contains most of the accessory structures such as hair follicles, sweat glands, and sensory receptors?

Accepted Answer

Dermis

Question 4

A person with albinism has very light skin and hair. Which of the following best explains this condition?

Accepted Answer

Their melanocytes do not produce melanin due to a genetic mutation.

Question 5

Which of the following is a function of the skin that helps regulate body temperature when the body is too warm?

Accepted Answer

Increased sweat production and vasodilation of dermal blood vessels

Question 6

A patient is experiencing cyanosis, which is a bluish discoloration of the skin. What is the most likely physiological cause?

Accepted Answer

Low oxygen levels in the blood

Question 7

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

Accepted Answer

They function as immune cells, protecting against pathogens.

Question 8

A person spends several hours in the sun and develops a tan. Which process is primarily responsible for the darkening of their skin?

Accepted Answer

Increased synthesis and transfer of melanin by melanocytes

Question 9

Which of the following equations best represents the relationship between heat loss by evaporation ($$Q_{evap}$$), mass of sweat evaporated ($$m$$), and the latent heat of vaporization ($$L_v$$)?

Accepted Answer

$$Q_{evap} = m 	imes L_v$$

Question 10

A patient with a third-degree burn is at high risk for which of the following complications due to the loss of skin integrity?

Accepted Answer

Dehydration and infection

Question 11

Which of the following best explains why elderly individuals are more prone to feeling cold?

Accepted Answer

Decreased fat in the subcutaneous layer

Question 12

A person cuts their skin, and a clot forms at the site of injury. Which of the following is the next step in the wound healing process?

Accepted Answer

Fibroblasts secrete new collagen fibers to bind the wound together.

Question 13

Which of the following is a correct statement about the stratum basale?

Accepted Answer

It contains rapidly dividing cells and melanocytes.

Question 14

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

Accepted Answer

They secrete sebum to keep hair and skin soft and waterproof.

Question 15

A person is exposed to cold temperatures, and their skin appears pale. Which physiological response is most likely responsible for this change?

Accepted Answer

Constriction of dermal blood vessels

Question 16

Which of the following best explains why the skin is considered an organ?

Accepted Answer

It is made up of two or more tissue types working together for a common function.

Question 17

Which of the following is a correct sequence of events during inflammation after a skin injury?

Accepted Answer

Vasodilation, increased capillary permeability, WBC migration to the site

Question 18

Which of the following best describes the function of tactile (Meissner's) corpuscles in the skin?

Accepted Answer

They detect light touch and texture.

Question 19

A patient with jaundice has yellowish skin. Which of the following is the most likely cause?

Accepted Answer

Inability to break down hemoglobin

Question 20

Which of the following best explains why the skin is able to synthesize vitamin D?

Accepted Answer

Exposure to ultraviolet light activates a precursor molecule in the skin.

Chapter 6: Integumentary System – Anatomy & Physiology Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard