Question 1

Which layer of the epidermis is responsible for the continuous regeneration of skin cells and contains melanocytes that produce melanin?

Accepted Answer

Stratum Basale (stratum germinativum)

Question 2

A patient presents with a burn that has destroyed the epidermis, dermis, and accessory structures such as hair follicles and glands. The patient reports little pain in the affected area. What degree of burn does this patient most likely have?

Accepted Answer

Third-degree burn

Question 3

Which of the following best explains why the skin appears blue (cyanosis) in certain medical conditions?

Accepted Answer

Low oxygen levels in the blood affecting dermal circulation

Question 4

A person eats excessive amounts of carrots and develops an orange tint to their skin. Which pigment is responsible for this color change?

Accepted Answer

Carotene

Question 5

Which structure in the skin is responsible for detecting pressure and is found in the reticular layer and subcutaneous layer?

Accepted Answer

Pacinian corpuscles

Question 6

A patient develops a blister after wearing tight shoes. What is the anatomical basis for blister formation?

Accepted Answer

Separation of the epidermal and dermal layers by a fluid-filled pocket

Question 7

Which type of gland is responsible for producing sebum, and what is the primary function of sebum?

Accepted Answer

Sebaceous gland; keeps hair from becoming brittle and inhibits bacterial growth

Question 8

A patient with a history of prolonged bed rest develops a crater-like opening in the skin over the sacrum. What is the most likely diagnosis?

Accepted Answer

Decubitus ulcer (bedsore)

Question 9

Which layer of the dermis is responsible for forming the epidermal ridges seen in fingerprints and contains extensive capillary blood supply?

Accepted Answer

Papillary layer

Question 10

A patient presents with a yellowish coloration of the skin and sclera. Which condition is most likely responsible for this finding?

Accepted Answer

Jaundice

Question 11

Which of the following statements about hair growth is correct?

Accepted Answer

Hair grows about 1 mm every three days and head hair lasts about 2-5 years

Question 12

Which type of sweat gland is most numerous and is primarily responsible for cooling the surface of the skin?

Accepted Answer

Merocrine (eccrine) sweat gland

Question 13

A patient presents with a rapidly growing, darkly pigmented skin lesion. Biopsy reveals malignant cells arising from melanocytes. Which type of skin cancer is this?

Accepted Answer

Malignant melanoma

Question 14

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

Accepted Answer

Contracts involuntarily to cause 'goose-bumps' under stress

Question 15

A patient has a burn affecting the anterior and posterior surfaces of both legs. According to the Rule of Nines, what percentage of the body surface is affected?

Accepted Answer

$$36\%$$

Question 16

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

Accepted Answer

Production of red blood cells

Question 17

Which layer of the epidermis is found only in thick skin, such as the palms and soles, and contains cells filled with eleidin?

Accepted Answer

Stratum Lucidum

Question 18

A patient with a history of sun exposure develops a skin lesion that arises from the stratum germinativum and rarely metastasizes. What is the most likely diagnosis?

Accepted Answer

Basal cell carcinoma

Question 19

Which of the following best describes the process of keratinization in the stratum corneum?

Accepted Answer

Cells fill with keratin, die, and are shed in sheets

Question 20

A patient presents with loss of skin color in patches. Which condition is most likely responsible for this finding?

Accepted Answer

Vitiligo

Integumentary System: Structure, Function, and Clinical Aspects

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