Question 1

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

Accepted Answer

Production of red blood cells

Question 2

A patient presents with a burn that has destroyed both the epidermis and the entire dermis. According to the rule of nines, if the entire anterior trunk is affected, what percentage of the body surface area is involved?

Accepted Answer

$$18\%$$

Question 3

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

Accepted Answer

Stratum basale

Question 4

Which cell type in the epidermis is primarily responsible for immune defense?

Accepted Answer

Dendritic cells

Question 5

A patient has a laceration that penetrates through the epidermis and into the papillary dermis. Which structures are most likely to be affected?

Accepted Answer

Dermal papillae and capillary loops

Question 6

Which gland is responsible for producing an oily substance that lubricates the skin and hair?

Accepted Answer

Sebaceous gland

Question 7

Which of the following best describes the composition and function of the hypodermis?

Accepted Answer

Composed of areolar and adipose tissue; insulates and anchors skin

Question 8

Which layer of the epidermis is only present in thick skin, such as the palms and soles?

Accepted Answer

Stratum lucidum

Question 9

A mutation causes a defect in the lamellar granules of keratinocytes. Which function of the skin would be most directly impaired?

Accepted Answer

Waterproofing of the skin

Question 10

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

Accepted Answer

Epidermal ridges formed by underlying dermal papillae patterns

Question 11

A patient with a genetic disorder lacks functional arrector pili muscles. Which of the following symptoms would most likely be observed?

Accepted Answer

Inability to make hair stand erect when cold or frightened

Question 12

Which type of skin cancer arises from the keratinocytes of the stratum spinosum and is considered more dangerous than basal cell carcinoma but less dangerous than melanoma?

Accepted Answer

Squamous cell carcinoma

Question 13

Which of the following best describes the secretion mechanism of sebaceous glands?

Accepted Answer

Holocrine secretion, where entire cells disintegrate to release sebum

Question 14

A patient presents with a musky body odor and increased sweating in the axillary region. Which gland is primarily responsible for this type of sweat?

Accepted Answer

Apocrine gland

Question 15

Which of the following structures is responsible for the sense of touch in the skin?

Accepted Answer

Tactile epithelial cells (Merkel cells)

Question 16

A patient has a wound that only affects the stratum corneum. Which of the following best describes the expected healing process?

Accepted Answer

Rapid healing with no scarring, as only dead cells are lost

Question 17

Which of the following is a correct pairing of a skin appendage and its function?

Accepted Answer

Nails – protect the distal tips of fingers and toes

Question 18

A patient with a third-degree burn over the entire right arm and anterior trunk would have what percentage of body surface area affected, according to the rule of nines?

Accepted Answer

$$27\%$$

Question 19

Which of the following best explains why the stratum corneum is important for the skin’s protective function?

Accepted Answer

It consists of multiple layers of dead, keratinized cells that form a barrier against abrasion and pathogens

Question 20

Which of the following statements about the dermis is TRUE?

Accepted Answer

It contains two layers: the papillary and reticular layers

The Integumentary System: Structure and Function

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