Question 1

Which of the following best explains why third-degree burns often require skin grafting for recovery?

Accepted Answer

Third-degree burns destroy both the epidermis and dermis, eliminating the regenerative cells needed for skin repair.

Question 2

A patient presents with a shiny, dome-shaped nodule on their face that later develops a central ulcer with a pearly edge. Which type of skin cancer is most likely present?

Accepted Answer

Basal cell carcinoma

Question 3

Which of the following statements about sebaceous glands is TRUE?

Accepted Answer

They secrete sebum, which lubricates the skin and contains antibacterial chemicals.

Question 4

A 7-year-old child presents with pink, fluid-filled, raised lesions around the mouth that develop a yellow crust and rupture. Which condition is most likely?

Accepted Answer

Impetigo

Question 5

Which of the following best describes the function of eccrine sweat glands?

Accepted Answer

They play a major role in thermoregulation by secreting sweat that evaporates and cools the body.

Question 6

A patient has a burn that is red, painful, and blistered, but the underlying tissue is not exposed. Which type of burn is this?

Accepted Answer

Second-degree burn

Question 7

Which of the following is a characteristic of malignant melanoma according to the ABCDE rule?

Accepted Answer

The lesion has areas of different colors, such as black, brown, tan, blue, or red.

Question 8

A patient presents with an itchy, red, peeling condition between the toes. Which pathogen is most likely responsible?

Accepted Answer

Fungus (Tinea pedis)

Question 9

Which of the following best explains why hair appears gray or white as people age?

Accepted Answer

There is a decrease or absence of melanin production in the hair bulb.

Question 10

Which of the following is a function of sebum produced by sebaceous glands?

Accepted Answer

It prevents hair from becoming brittle and inhibits bacterial growth.

Question 11

A patient with a history of sun exposure presents with a scaly, reddened papule on the lower lip that forms a shallow ulcer with a firm, raised border. Which type of skin cancer is most likely?

Accepted Answer

Squamous cell carcinoma

Question 12

Which of the following best describes the structure and function of the arrector pili muscle?

Accepted Answer

It is a small band of smooth muscle that contracts to pull the hair upright, causing 'goose bumps.'

Question 13

Which of the following is a plausible reason why apocrine sweat glands are associated with body odor?

Accepted Answer

Their secretion contains proteins and fatty acids that bacteria metabolize, producing odor.

Question 14

A 25-year-old man develops a cluster of boils on the back of his neck. Which of the following is the most likely causative agent?

Accepted Answer

Staphylococcus aureus

Question 15

Which of the following best explains why the skin appears pink under healthy nails?

Accepted Answer

The underlying dermis is richly supplied with blood vessels.

Question 16

A patient with a history of emotional stress develops small, fluid-filled blisters around the lips that itch and sting. Which virus is most likely responsible?

Accepted Answer

Herpes simplex virus 1

Question 17

Which of the following is a correct application of the rule of nines for estimating burn area in an adult?

Accepted Answer

Each arm represents 9% of the total body surface area.

Question 18

Which of the following best explains why the cuticle of the hair shaft is important?

Accepted Answer

It provides strength and keeps the inner hair layers tightly compacted.

Question 19

A patient presents with reddened epidermal lesions covered with dry, silvery scales that itch and sometimes bleed. Which of the following is the most likely diagnosis?

Accepted Answer

Psoriasis

Question 20

A 60-year-old man has a pigmented skin lesion that is asymmetrical, has irregular borders, contains multiple colors, and is larger than 6 mm in diameter. According to the ABCDE rule, which type of skin cancer should be suspected?

Accepted Answer

Malignant melanoma

Skin Appendages and Homeostatic Imbalances: Structure, Function, and Disorders

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