Question 1

Which of the following best describes the primary function of the stratum corneum in the epidermis?

Accepted Answer

It provides a waterproof barrier and prevents pathogen entry due to its layers of dead, keratinized cells.

Question 2

A patient presents with a burn that affects the epidermis, dermis, and hypodermis. According to burn classification, what degree is this burn?

Accepted Answer

Third degree

Question 3

Which cell type in the stratum basale is primarily responsible for producing the pigment that protects against UV radiation?

Accepted Answer

Melanocyte

Question 4

Which of the following glands is most responsible for thermoregulation through evaporative cooling?

Accepted Answer

Eccrine sweat gland

Question 5

A lesion is found to be asymmetrical, with irregular borders, multiple colors, and a diameter larger than 6 mm. According to the ABCDE rule, what is the most likely diagnosis?

Accepted Answer

Melanoma

Question 6

Which structure is responsible for the formation of fingerprints?

Accepted Answer

Dermal papillae

Question 7

A patient with a genetic defect in keratin production would most likely have abnormalities in which structures?

Accepted Answer

Hair, nails, and the stratum corneum

Question 8

Which of the following best explains why the hypodermis is important for thermoregulation?

Accepted Answer

It stores adipose tissue, which insulates the body and reduces heat loss.

Question 9

Which phase of the hair growth cycle is characterized by rapid cell division at the root and active hair growth?

Accepted Answer

Anagen phase

Question 10

A patient presents with dry, itchy patches of skin that sometimes bleed. Which condition is most likely?

Accepted Answer

Eczema

Question 11

Which of the following is NOT a function of sebum produced by sebaceous glands?

Accepted Answer

Production of sweat for cooling

Question 12

Which layer of the epidermis is only found in thick skin, such as the palms and soles?

Accepted Answer

Stratum lucidum

Question 13

A patient with a wound that heals with a raised, collagen-rich formation is most likely experiencing which of the following?

Accepted Answer

Keloid

Question 14

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

Accepted Answer

They act as macrophages, providing immune defense.

Question 15

Which of the following equations best represents the calculation of the total body surface area affected by burns using the Rule of Nines?

Accepted Answer

$$Total\ Body\ Surface\ Area\ (\%) = Number\ of\ Areas\ Burned 	imes 9$$

Question 16

Which structure is responsible for raising the hair and causing 'goosebumps'?

Accepted Answer

Arrector pili muscle

Question 17

Which of the following best explains why vitamin D synthesis is dependent on the integumentary system?

Accepted Answer

Keratinocytes in the epidermis convert cholesterol to vitamin D when exposed to UV radiation.

Question 18

Which of the following best describes the difference between vellus and terminal hair?

Accepted Answer

Vellus hair is thin and nonpigmented, while terminal hair is thick and pigmented.

Question 19

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

Accepted Answer

Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, stratum corneum

Question 20

A patient presents with a rapidly growing, firm, elevated lesion that is highly metastatic. Which type of skin cancer is most likely?

Accepted Answer

Melanoma

The Integumentary System: Structure, Function, and Clinical Aspects

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