$$Total\ Burned\ Area\ (\%) = 9\% \times (Number\ of\ body\ regions\ affected)$$

$$Skin\ Thickness = Initial\ Thickness + (Rate\ of\ Growth \times Age)$$

Question 1

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

Accepted Answer

It acts as a barrier to physical and chemical injury, preventing water loss.

Question 2

A patient presents with yellowish skin coloration. Which pigment is most likely responsible for this appearance?

Accepted Answer

Carotene

Question 3

Which layer of the dermis is responsible for fingerprints and contains dermal papillae?

Accepted Answer

Papillary layer

Question 4

A burn patient has damage extending through the epidermis and entire dermis, with loss of sensation. What type of burn is this?

Accepted Answer

Third-degree (full-thickness) burn

Question 5

Which of the following equations correctly estimates the percentage of body surface area burned using the Rule of Nines?

Accepted Answer

$$Total\ Burned\ Area\ (\%) = 9\% 	imes (Number\ of\ body\ regions\ affected)$$

Question 6

Which cell type in the epidermis is primarily responsible for producing the pigment that protects DNA from UV damage?

Accepted Answer

Melanocytes

Question 7

A patient is unable to sweat due to malfunction of their eccrine glands. Which physiological process will be most affected?

Accepted Answer

Regulation of body temperature through evaporative cooling

Question 8

Which of the following best explains why the skin is considered a barrier with multiple functions?

Accepted Answer

It provides protection, regulates temperature, synthesizes vitamin D, and contains sensory receptors.

Question 9

Which structure is responsible for causing hair to stand upright when a person is cold or frightened?

Accepted Answer

Arrector pili muscle

Question 10

A patient has a genetic condition causing excessive production of DHT, leading to hair thinning. Which process is most directly affected?

Accepted Answer

Rate of hair follicle growth and cycling

Question 11

Which of the following is a correct description of the difference between apocrine and eccrine sweat glands?

Accepted Answer

Eccrine glands secrete watery sweat for temperature regulation; apocrine glands secrete a thicker sweat associated with puberty.

Question 12

Which of the following best describes the composition of the reticular layer of the dermis?

Accepted Answer

Dense irregular connective tissue containing collagen and elastic fibers

Question 13

A patient presents with a mole that has changed in color, diameter, and border irregularity. Which skin cancer screening rule is being applied?

Accepted Answer

ABCDE rule

Question 14

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

Accepted Answer

Regulates body temperature through evaporative cooling

Question 15

Which equation best represents the relationship between skin thickness and age, based on developmental aspects?

Accepted Answer

$$Skin\ Thickness = Initial\ Thickness + (Rate\ of\ Growth 	imes Age)$$

Question 16

Which of the following statements about nails is correct?

Accepted Answer

Nails are composed of dead keratinized cells and grow from the proximal end.

Question 17

Which of the following is a correct sequence of layers from the outermost to innermost in the epidermis?

Accepted Answer

Stratum corneum, stratum granulosum, stratum spinosum, stratum basale

Question 18

Which of the following best explains why melanin production increases after exposure to sunlight?

Accepted Answer

UV radiation stimulates melanocytes to produce more melanin, which protects DNA from damage.

Question 19

A patient with a wound that does not bleed likely has damage limited to which layer?

Accepted Answer

Epidermis

The Integumentary System: Structure, Function, and Clinical Aspects

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