Question 1

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

Accepted Answer

They synthesize keratin, providing structural strength and water resistance to the skin.

Question 2

A patient suffers a deep laceration that damages both the epidermis and dermis. Which process is most likely to occur during tissue repair in this scenario?

Accepted Answer

Fibrosis, where fibroblasts produce collagen leading to scar tissue formation.

Question 3

Which of the following is a key difference between exocrine and endocrine glands?

Accepted Answer

Exocrine glands use ducts to transport their secretions to body surfaces, while endocrine glands release hormones directly into the blood.

Question 4

A person with a third-degree burn on their arm is at risk for which of the following complications?

Accepted Answer

Loss of sensation due to destruction of nerve endings.

Question 5

Which layer of the skin is primarily responsible for providing blood supply to the epidermis?

Accepted Answer

Dermis

Question 6

A patient with a genetic mutation that prevents the production of collagen would most likely experience which of the following symptoms?

Accepted Answer

Fragile skin that heals poorly and forms weak scars.

Question 7

Which of the following best explains why transdermal patches are an effective method for delivering certain medications?

Accepted Answer

Medications in patches are always nonpolar and can easily cross the epidermis to reach blood vessels in the dermis.

Question 8

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

$$Q = k \cdot A \cdot \Delta T / d$$

Question 9

A person moves from a high-UV environment to a low-UV environment over several generations. Which adaptation is most likely to occur in their descendants regarding skin pigmentation?

Accepted Answer

Decreased melanin production to allow more UV penetration for vitamin D synthesis.

Question 10

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

Accepted Answer

It contains adipose tissue that plays a significant role in thermoregulation and energy storage.

Question 11

Which of the following best describes the process of fibrosis during tissue repair?

Accepted Answer

Formation of scar tissue by fibroblasts producing collagen.

Question 12

A patient presents with a second-degree burn. Which of the following is most likely to be observed?

Accepted Answer

Destruction of the epidermis and part or all of the dermis, resulting in pain and blistering.

Question 13

Which of the following cell types in the epidermis is primarily responsible for immune defense?

Accepted Answer

Dendritic (Langerhans) cells

Question 14

A person with a deficiency in vitamin C is likely to experience impaired tissue repair because:

Accepted Answer

Vitamin C is required by fibroblasts to produce functional collagen.

Question 15

Which of the following is a function of the integumentary system that directly contributes to homeostasis?

Accepted Answer

Regulation of body temperature through sweat and blood flow.

Question 16

A patient with a wound that does not heal properly is found to have poor arterial blood supply to the area. Which of the following best explains the delayed healing?

Accepted Answer

Lack of oxygen and nutrients impairs cell division and immune response.

Question 17

Which of the following best explains why the skin is considered an organ?

Accepted Answer

It consists of multiple tissue types working together to perform specific functions.

Question 18

Which of the following scenarios would most likely result in the formation of a visible scar?

Accepted Answer

A deep cut that extends into the dermis and requires collagen deposition by fibroblasts.

Question 19

Which of the following is a correct statement about the role of melanin in the skin?

Accepted Answer

Melanin protects keratinocyte DNA from UV-induced mutations.

Question 20

A patient is exposed to a chemical that easily penetrates the epidermis. Which of the following is the most likely reason for this increased absorption?

Accepted Answer

The chemical is nonpolar and can diffuse through the lipid-based substances in the epidermis.

Anatomy & Physiology: Tissues and the Integumentary System (BIO 107 Study Notes)

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