Question 1

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

Accepted Answer

Regulation of blood glucose levels

Question 2

Keratinocytes are the most abundant cells in the epidermis. What is their main function?

Accepted Answer

Form a tough, waterproof barrier by producing keratin

Question 3

A patient presents with a deficiency in melanin production, resulting in very light skin and hair. Which condition does this describe?

Accepted Answer

Albinism

Question 4

Which layer of the epidermis is responsible for active cell division and growth?

Accepted Answer

Stratum basale

Question 5

Which of the following best describes the difference between eccrine and apocrine sweat glands?

Accepted Answer

Eccrine glands empty directly onto the skin surface and are active from birth, while apocrine glands empty into hair follicles and activate at puberty

Question 6

Which structure is primarily responsible for the sensation of light touch in the skin?

Accepted Answer

Meissner's (tactile) corpuscles

Question 7

A third-degree burn destroys the epidermis and dermis and may extend into the hypodermis. What is a major consequence of this type of burn?

Accepted Answer

Loss of sensation due to nerve destruction

Question 8

Which formula best represents the relationship between the thickness of the hypodermis ($$t_{hypo}) $$and the amount of stored adipose tissue ($$A) in $$the subcutaneous layer?

Accepted Answer

$$t_{hypo} = k 	imes A$$

Question 9

Which of the following is TRUE regarding sebaceous (oil) glands?

Accepted Answer

They surround hair shafts and secrete sebum into hair follicles

Question 10

A patient develops a firm, smooth, and raised scar that grows beyond the boundaries of the original wound. What type of scar is this?

Accepted Answer

Keloid scar

Question 11

Which layer of the skin contains dense irregular connective tissue, blood vessels, and nerve endings?

Accepted Answer

Dermis

Question 12

Which process describes the movement of keratinocytes from the deepest layer of the epidermis to the surface, where they eventually die and flake off?

Accepted Answer

Keratinization

Question 13

Which of the following is a correct sequence of the stages of skin healing after injury?

Accepted Answer

Inflammation, migration, proliferation, scarring

Question 14

Which of the following statements about aging and the skin is CORRECT?

Accepted Answer

Wound healing occurs more slowly

Question 15

Which layer is found only in thick, hairless skin such as the palms and soles?

Accepted Answer

Stratum lucidum

Question 16

If a person has a genetic mutation that reduces the function of melanocytes, which of the following is most likely to occur?

Accepted Answer

Decreased melanin production and lighter skin

Question 17

Which of the following best explains why apocrine sweat glands produce odor?

Accepted Answer

Their sweat contains fatty acids and proteins that are metabolized by skin bacteria

Question 18

Which formula would you use to estimate the time ($$T) $$required for complete replacement of the epidermal skin layer, given the average rate of cell turnover ($$r) $$and the number of cell layers ($$n$$)?

Accepted Answer

$$T = \frac{n}{r}$$

Question 19

Which of the following is a function of the arrector pili muscle?

Accepted Answer

Causes hair to stand up, producing 'goosebumps'

Question 20

Which of the following statements about nails is TRUE?

Accepted Answer

Nails protect the dorsal surfaces of the tips of fingers and toes

Lecture 4 Guide

Study Guide - Practice Questions

Study Guide - Flashcards