Question 1

Which of the following best explains why the stratum corneum is effective at preventing water loss from the body?

Accepted Answer

It contains many layers of flat, dead cells filled with keratin and glycolipids between the cells.

Question 2

A patient presents with a thick, scaly patch of skin. Biopsy reveals immature keratinocytes accumulating in the epidermis. Which condition is most likely responsible?

Accepted Answer

Psoriasis

Question 3

Which of the following structures is NOT derived from the epidermis?

Accepted Answer

Arrector pili muscle

Question 4

A person with albinism is at increased risk for skin cancer because:

Accepted Answer

Their melanocytes do not produce melanin, reducing UV protection.

Question 5

Which layer of the skin is responsible for fingerprints and what is its main tissue type?

Accepted Answer

Papillary layer of the dermis; areolar connective tissue

Question 6

Which of the following best describes the difference between thin and thick skin?

Accepted Answer

Thick skin contains the stratum lucidum and lacks hair follicles and sebaceous glands.

Question 7

A patient suffers a third-degree burn on their hand. Which of the following is most likely true regarding their sensation in the affected area?

Accepted Answer

They will not feel pain because nociceptors are destroyed.

Question 8

Which of the following best explains why the stratum granulosum is considered the last layer of living cells in the epidermis?

Accepted Answer

Cells above this layer are too far from the blood supply to survive.

Question 9

Which gland is responsible for producing an oily secretion that lubricates and protects the skin and hair, and what is this secretion called?

Accepted Answer

Sebaceous gland; sebum

Question 10

A person is unable to sweat due to a genetic disorder. Which of the following physiological problems are they most likely to experience during exercise?

Accepted Answer

Inability to regulate body temperature, leading to overheating

Question 11

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

Accepted Answer

It stores adipose tissue for insulation and energy.

Question 12

Which of the following is TRUE regarding the matrix of the hair follicle?

Accepted Answer

It is the site of hair growth and melanin production for hair color.

Question 13

A person with a mutation causing non-functional Meissner’s (tactile) corpuscles would most likely have difficulty with which sensation?

Accepted Answer

Detecting light touch

Question 14

Which of the following best explains why the stratum basale is essential for skin regeneration?

Accepted Answer

It contains keratinocytes that actively undergo mitosis.

Question 15

Which of the following is a function of ceruminous glands?

Accepted Answer

Producing ear wax to prevent insects from entering the ear canal

Question 16

A patient has a wound that only damages the epidermis. Which of the following structures would NOT be affected?

Accepted Answer

Blood vessels

Question 17

Which of the following best describes the role of glycolipids in the epidermis?

Accepted Answer

They create a waterproof barrier between cells.

Question 18

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

Accepted Answer

All humans have roughly the same number of melanocytes, but produce different amounts and shades of melanin.

Question 19

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

Accepted Answer

Epidermal ridges formed by dermal papillae in the papillary layer of the dermis create unique patterns.

Question 20

A person with a genetic defect in their sudoriferous glands would most likely have which of the following symptoms?

Accepted Answer

Difficulty cooling the body during exercise

The Integumentary System: Structure, Function, and Clinical Correlates

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