Question 1

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

Accepted Answer

It is composed of multiple tissue types that work together to perform specific functions.

Question 2

A patient is exposed to a cold environment. What physiological response occurs in the dermal blood vessels to conserve heat?

Accepted Answer

The dermal blood vessels constrict, reducing blood flow to the skin.

Question 3

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

Accepted Answer

Protection from acid-base imbalances

Question 4

Arrange the layers of the thick skin epidermis from deepest (1) to most superficial (5):
1. Stratum basale
2. Stratum spinosum
3. Stratum granulosum
4. Stratum lucidum
5. Stratum corneum

Accepted Answer

1. Stratum basale, 2. Stratum spinosum, 3. Stratum granulosum, 4. Stratum lucidum, 5. Stratum corneum

Question 5

Which of the following statements about skin cells is TRUE?

Accepted Answer

Dendritic cells are phagocytes that protect the skin from pathogens.

Question 6

Which statement about thick and thin skin is FALSE?

Accepted Answer

Thick skin has numerous hairs, whereas thin skin lacks hairs.

Question 7

Which of the following is NOT a function of body hair in humans?

Accepted Answer

Regulation of blood flow

Question 8

A shampoo claims to deliver vitamins to hair shafts to keep them healthy. Why is this claim scientifically questionable?

Accepted Answer

Hair shafts are composed of dead keratinized cells and do not require vitamins.

Question 9

Which of the following best describes the function of dermal papillae?

Accepted Answer

They increase the surface area for exchange of gases, nutrients, and waste products between the dermis and epidermis.

Question 10

Which pigment is responsible for the pinkish hue of light-colored skin when it binds large amounts of oxygen?

Accepted Answer

Hemoglobin

Question 11

Match the gland to its correct property: Which gland is a simple coiled tubular gland found over most of the body that secretes sweat through a sweat pore?

Accepted Answer

Eccrine sweat gland

Question 12

Why does a person not bleed when a hair is pulled out or a nail is cut?

Accepted Answer

Neither hair shafts nor nails contain blood vessels.

Question 13

A patient collapses during a bike race and presents with bright red skin. What does this skin color most likely indicate?

Accepted Answer

Vasodilation and increased blood flow to the skin due to overheating

Question 14

After contact with poison ivy (lipid-soluble oils), Ramon develops a rash, but Cathy does not react to snake venom (water-soluble peptides). Why?

Accepted Answer

Lipid-soluble substances can penetrate the epidermis, while water-soluble substances cannot.

Question 15

Collagen and hyaluronic acid are often included in antiaging creams. Which statement is correct regarding their absorption?

Accepted Answer

They are polar molecules and are unlikely to be absorbed through the epidermis.

Question 16

A mild second-degree burn damages the epidermis and part of the dermis. How is this injury most likely to heal?

Accepted Answer

By regeneration, because some epithelial cells remain to divide.

Question 17

Which of the following best describes the difference between sweat and sebum?

Accepted Answer

Sweat is a watery secretion for thermoregulation; sebum is an oily secretion for lubrication.

Question 18

Which of the following statements about melanin is TRUE?

Accepted Answer

Melanin is derived from the amino acid tyrosine and is produced by melanocytes.

Question 19

Which of the following is the correct sequence for the portion of the hair?
Fill in the blanks: The portion of the hair that projects from the surface of the skin is the _______, and the portion within the dermis is the _______, which is embedded in a(n) _______. The portion of the hair that contains cells that undergo mitosis during the growth stage of the hair is known as the _______.

Accepted Answer

shaft; root; hair follicle; hair matrix

Question 20

Would a third-degree burn that involves muscle tissue heal by regeneration or fibrosis? Why?

Accepted Answer

By fibrosis, because the damage extends beyond the regenerative capacity of the skin.

A&P I Chapter 5: Integumentary System Study Guide – Step-by-Step Guidance

Study Guide - Practice Questions

Study Guide - Flashcards