Question 1

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

Accepted Answer

Synthesis of vitamin C

Question 2

A patient presents with a deep cut that exposes the dense irregular connective tissue and contains many collagen fibers. Which layer of the skin has been reached?

Accepted Answer

Reticular layer of the dermis

Question 3

Which layer of the epidermis is responsible for the synthesis of vitamin D3 when exposed to sunlight?

Accepted Answer

Stratum basale

Question 4

A burn patient is losing large amounts of water through insensible perspiration. Which layer of the epidermis is most likely damaged?

Accepted Answer

Stratum corneum

Question 5

Which of the following best describes the main function of melanocytes in the epidermis?

Accepted Answer

Producing melanin to protect against UV radiation

Question 6

A biopsy of skin tissue reveals a high density of tactile (Meissner's) corpuscles. This tissue most likely came from which region?

Accepted Answer

Papillary layer of the dermis

Question 7

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

Accepted Answer

Stratum granulosum

Question 8

A patient with a genetic defect in desmosome formation would most likely experience which of the following symptoms?

Accepted Answer

Increased risk of dehydration due to loss of cell-to-cell adhesion in the stratum corneum

Question 9

Which of the following best explains why incisions made parallel to tension lines heal faster and with less scarring?

Accepted Answer

They follow the orientation of collagen fibers in the dermis

Question 10

Which of the following statements about the subcutaneous layer (hypodermis) is TRUE?

Accepted Answer

It is technically not part of the skin

Question 11

A person with a mutation that prevents the formation of lamellated (Pacinian) corpuscles would have difficulty detecting which type of stimulus?

Accepted Answer

Pressure and vibration

Question 12

Which of the following best describes the process by which keratinocytes move from the stratum basale to the stratum corneum?

Accepted Answer

They divide and are pushed upward, accumulating keratin and eventually dying

Question 13

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 14

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

Accepted Answer

Dendritic (Langerhans) cells

Question 15

A patient with a deficiency in carotene would most likely experience which of the following?

Accepted Answer

Decreased orange-yellow pigmentation in the skin

Question 16

Which of the following best explains why the stratum corneum is an effective barrier against water loss?

Accepted Answer

It is composed of multiple layers of dead, keratinized cells tightly connected by desmosomes

Question 17

Which of the following best describes the role of the papillary layer of the dermis?

Accepted Answer

It anchors the epidermis and contains capillaries for nutrient diffusion

Question 18

A person with a mutation that prevents the formation of epidermal ridges would most likely lack which of the following?

Accepted Answer

Fingerprints

Question 19

Which of the following equations best represents the relationship between the rate of insensible perspiration ($$R_{ip}) $$and the integrity of the stratum corneum ($$I_{sc}$$), assuming $$R_{ip}$$ increases as $$I_{sc}$$ decreases?

Accepted Answer

$$R_{ip} = \frac{k}{I_{sc}}$$

Question 20

Which of the following best describes the main function of the subcutaneous layer?

Accepted Answer

Insulation, energy storage, and connection to underlying tissues

The Integumentary System: Structure and Function

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