Question 1

Which of the following best describes the main function of the stratum germinativum (basale) in the epidermis?

Accepted Answer

It contains stem cells that continuously divide to replace lost or damaged epidermal cells.

Question 2

A patient presents with yellowing of the skin and eyes. Which condition is most likely responsible for this symptom, and what is the underlying cause?

Accepted Answer

Jaundice; accumulation of bile pigments due to liver dysfunction

Question 3

Which of the following statements about the dermis is correct?

Accepted Answer

The reticular layer contains most of the accessory structures such as hair follicles and glands.

Question 4

Which pigment is responsible for the orange/yellow coloration of the skin and is converted to vitamin A?

Accepted Answer

Carotene

Question 5

A person who spends a lot of time in the sun has increased melanin production. What is the primary function of this response?

Accepted Answer

To protect DNA in skin cells from UV radiation damage

Question 6

Which of the following best explains why bed sores (decubitus ulcers) develop in bedridden patients?

Accepted Answer

Continuous pressure interrupts blood flow, leading to cell death and increased risk of infection.

Question 7

Which gland is responsible for producing an oily secretion that inhibits bacterial growth and lubricates hair?

Accepted Answer

Sebaceous gland

Question 8

A child is diagnosed with rickets, a disease characterized by weak bones. Which process in the skin is most directly related to the prevention of this disease?

Accepted Answer

Synthesis of vitamin D3 in the epidermis upon exposure to sunlight

Question 9

Which of the following is a correct sequence of layers in thick skin from deepest to most superficial?

Accepted Answer

Stratum germinativum, stratum spinosum, stratum granulosum, stratum lucidum, stratum corneum

Question 10

Which of the following best describes the difference between merocrine and apocrine sweat glands?

Accepted Answer

Merocrine glands are responsible for sensible perspiration and thermoregulation, while apocrine glands produce a thicker secretion that bacteria can metabolize to produce odor.

Question 11

A patient with a genetic defect preventing the production of the amino acid tyrosine would most likely exhibit which of the following symptoms?

Accepted Answer

White skin and hair due to lack of melanin (albinism)

Question 12

Which of the following structures is NOT considered part of the cutaneous membrane?

Accepted Answer

Subcutaneous (hypodermis) layer

Question 13

Which of the following best explains why the stratum corneum is water-resistant but not waterproof?

Accepted Answer

It contains keratinized cells that slow water loss but allow some evaporation (insensible perspiration).

Question 14

Which of the following is a function of the arrector pili muscle?

Accepted Answer

Causing hair to stand up in response to cold or emotional states

Question 15

A patient presents with a painless, rapidly dividing patch of skin cells on the scalp. Which condition is most likely?

Accepted Answer

Psoriasis

Question 16

Which of the following best describes the process of keratinization?

Accepted Answer

The formation of a protective layer of dead cells filled with keratin in the stratum corneum

Question 17

Which of the following is a correct statement about the repair of skin after injury?

Accepted Answer

Fibroblasts produce a meshwork of fibers that forms scar tissue during the healing process.

Question 18

Which of the following best explains why the subcutaneous layer is a good site for injections?

Accepted Answer

It contains a large number of blood vessels, allowing rapid absorption of injected substances.

Question 19

Which of the following is a function of ceruminous glands?

Accepted Answer

Secreting wax (cerumen) in the ear canal for protection

Question 20

Which of the following best describes the role of Langerhans cells in the epidermis?

Accepted Answer

They defend against microorganisms and attack superficial skin cancers.

Chapter 5: The Integumentary System – Anatomy & Physiology I Study Guide

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