Question 1

Which of the following best describes the primary function of melanin in the skin?

Accepted Answer

To protect DNA in skin cells from ultraviolet (UV) radiation

Question 2

A patient presents with a bluish tint to their skin, especially noticeable in the lips and fingertips. Which physiological condition is most likely responsible for this appearance?

Accepted Answer

Oxygen-poor blood in the dermal vessels (cyanosis)

Question 3

Which layer of the epidermis is responsible for the continuous production of new skin cells?

Accepted Answer

Stratum basale

Question 4

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

Accepted Answer

Subcutaneous (hypodermis) layer

Question 5

A person with a genetic inability to produce melanin will most likely exhibit which of the following characteristics?

Accepted Answer

White hair and very pale skin (albinism)

Question 6

Which type of gland is responsible for producing the oily substance that lubricates and waterproofs the skin and hair?

Accepted Answer

Sebaceous gland

Question 7

During wound healing, which cell type is primarily responsible for producing collagen fibers to bind the edges of a deep wound together?

Accepted Answer

Fibroblasts

Question 8

Which of the following best explains why the skin is able to regulate body temperature?

Accepted Answer

The dermis contains sweat glands and blood vessels that respond to temperature changes

Question 9

A patient has a wound that extends into the dermis and forms a scar. Which process is most responsible for the formation of the scar?

Accepted Answer

Overproduction of collagen fibers by fibroblasts

Question 10

Which of the following statements about the stratum corneum is correct?

Accepted Answer

It is composed of dead, flattened, keratinized cells that are continually shed

Question 11

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

Accepted Answer

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

Question 12

Which of the following is a correct sequence of events in the healing of a deep wound?

Accepted Answer

Blood clot formation → fibroblast migration → collagen fiber production → scab formation → tissue regeneration

Question 13

Which of the following glands is incorrectly matched with its secretion?

Accepted Answer

Mammary gland – sweat

Question 14

A person eats a diet high in orange and yellow vegetables and develops a yellowish tint to their skin. Which pigment is most likely responsible?

Accepted Answer

Carotene

Question 15

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

Accepted Answer

It is composed of stratified squamous epithelium and receives nutrients by diffusion from the dermis

Question 16

Which of the following is a function of the subcutaneous (hypodermis) layer?

Accepted Answer

Anchors the skin to underlying tissues and insulates the body

Question 17

Which of the following best describes the process of keratinization?

Accepted Answer

The hardening, dehydration, and death of epidermal cells as they move outward

Question 18

Which of the following is true regarding the distribution of melanocytes in human skin?

Accepted Answer

All people have about the same number of melanocytes, but the amount of melanin produced varies

Question 19

Which of the following best explains why fingerprints are unique to each individual?

Accepted Answer

They are formed by the pattern of dermal papillae and epidermal ridges, which are genetically determined

Question 20

Which of the following is a correct statement about the nail matrix?

Accepted Answer

It is the most actively growing region of the nail

The Integumentary System: Structure, Function, and Healing

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