Question 1

Which of the following best describes the main function of the stratum basale in the epidermis?

Accepted Answer

Serves as the site of new cell production and contains melanocytes for UV protection

Question 2

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

Accepted Answer

Stratum lucidum

Question 3

Which of the following statements about the dermis is correct?

Accepted Answer

The papillary layer contains loose areolar connective tissue and supports the epidermis

Question 4

Which gland is responsible for producing an oily substance that lubricates and waterproofs the skin and hair, and what is the mode of secretion?

Accepted Answer

Sebaceous gland; holocrine secretion

Question 5

Which of the following best explains why thick skin is found only on the palms and soles?

Accepted Answer

It has an extra layer, the stratum lucidum, to resist friction and abrasion

Question 6

A person is unable to sweat in response to heat. Which structure is most likely malfunctioning?

Accepted Answer

Eccrine (merocrine) sweat glands

Question 7

Which of the following is a correct pairing of sensory receptor and its function/location?

Accepted Answer

Meissner’s (tactile) corpuscles – light touch in dermal papillae

Question 8

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

Accepted Answer

Both use merocrine secretion, but apocrine glands produce thicker, musky secretions and are associated with hair follicles

Question 9

Which of the following equations best represents the rate of water loss through the stratum corneum, assuming it is not waterproof?

Accepted Answer

$$ J = -D \frac{\Delta C}{\Delta x} $$

Question 10

A burn patient loses the entire epidermis and part of the dermis. Which layers are definitely destroyed?

Accepted Answer

Stratum corneum, stratum granulosum, and papillary layer

Question 11

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

Accepted Answer

Production of red blood cells

Question 12

Which cell type in the epidermis is responsible for producing the pigment that protects against UV radiation?

Accepted Answer

Melanocyte

Question 13

A patient has a genetic defect that prevents the formation of dense irregular connective tissue. Which skin structure would be most affected?

Accepted Answer

Reticular layer of the dermis

Question 14

Which of the following best describes the process of holocrine secretion?

Accepted Answer

The entire cell ruptures, releasing its contents

Question 15

Which of the following structures is NOT technically part of the integumentary system?

Accepted Answer

Hypodermis

Question 16

Which of the following best explains why the epidermis is avascular?

Accepted Answer

It relies on diffusion from the underlying dermis for nutrient and waste exchange

Question 17

Which of the following is a correct sequence of the layers of the epidermis in thin skin, from superficial to deep?

Accepted Answer

Stratum corneum, stratum granulosum, stratum spinosum, stratum basale

Question 18

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

Accepted Answer

They contract to cause hair to stand on end, aiding in thermoregulation

Question 19

A person with a mutation that prevents the formation of keratohyalin granules would have a defect in which layer?

Accepted Answer

Stratum granulosum

The Integumentary System: Structure and Function

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