Question 1

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

Accepted Answer

Regulation of blood glucose

Question 2

A patient presents with a yellowish tint to their skin and eyes. Which abnormal skin color is this, and what is the most likely underlying cause?

Accepted Answer

Jaundice; accumulation of bilirubin due to liver dysfunction

Question 3

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

Accepted Answer

Stratum basale

Question 4

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

Accepted Answer

Langerhans cell

Question 5

A forensic scientist is analyzing fingerprints. Which structure is responsible for the unique patterns observed in fingerprints?

Accepted Answer

Dermal papillae

Question 6

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

Accepted Answer

Thick skin contains a stratum lucidum and a much thicker stratum corneum

Question 7

Which gland is responsible for producing an oily secretion that helps keep hair and skin moist, and what is this secretion called?

Accepted Answer

Sebaceous gland; sebum

Question 8

A patient is unable to sweat properly and is at risk for overheating. Which structure is most likely malfunctioning?

Accepted Answer

Eccrine (merocrine) sweat gland

Question 9

Which layer of the dermis is responsible for fingerprints and contains Meissner's (tactile) corpuscles?

Accepted Answer

Papillary layer

Question 10

A mutation causes a loss of function in the protein keratin. Which of the following would most likely result?

Accepted Answer

The skin would become less water-resistant and more prone to injury.

Question 11

Which of the following best explains why the subcutaneous layer (hypodermis) is not considered part of the integumentary system?

Accepted Answer

It separates the integumentary system from the deep fascia and is primarily adipose and areolar tissue.

Question 12

Which of the following is TRUE regarding the movement of cells from the stratum basale to the stratum corneum?

Accepted Answer

It takes 15-30 days for cells to move from the stratum basale to the stratum corneum.

Question 13

Which structure is responsible for causing 'goosebumps' when contracted?

Accepted Answer

Arrector pili muscle

Question 14

A patient presents with a pressure sore (decubitus ulcer) on their heel. Which property of the dermis is most relevant to the development of this condition?

Accepted Answer

Rich vascularization

Question 15

Which of the following best describes the composition and function of the reticular layer of the dermis?

Accepted Answer

Dense irregular connective tissue; resists tension and contains sweat/sebaceous glands

Question 16

Which of the following statements about melanin is CORRECT?

Accepted Answer

The amount of melanin produced by each melanocyte determines skin color.

Question 17

Which of the following best describes the secretion of apocrine sweat glands?

Accepted Answer

Odorous secretion rich in protein and fat, found in axilla and genital areas

Question 18

A patient has a genetic mutation that prevents the formation of desmosomes in the epidermis. Which layer would be most affected?

Accepted Answer

Stratum spinosum

Question 19

Which of the following is the correct order of the layers of the epidermis in thick skin, from deep to superficial?

Accepted Answer

Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, stratum corneum

Question 20

Which of the following equations best represents the relationship between the rate of heat loss ($$Q) $$through the skin, the surface area ($$A$$), the temperature difference ($$\Delta T$$), and the thickness of the skin ($$d$$), assuming the skin acts as a simple barrier?

Accepted Answer

$$Q = k \frac{A \Delta T}{d}$$

The Integumentary System: Structure and Function

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