Question 1

Which layer of the epidermis is responsible for the continuous shedding of dead cells and must be replaced from deeper layers to maintain the integrity of the skin?

Accepted Answer

Stratum corneum

Question 2

A patient presents with a burn that affects both the epidermis and the entire dermis. Which type of burn is this classified as?

Accepted Answer

Third-degree burn

Question 3

Which accessory structure of the skin is responsible for the contraction that causes hair to stand up, resulting in 'goosebumps'?

Accepted Answer

Arrector pili muscle

Question 4

Which pigment is primarily responsible for determining the color of human skin?

Accepted Answer

Melanin

Question 5

A patient’s skin appears blue due to decreased oxygenation of hemoglobin. What is this condition called?

Accepted Answer

Cyanosis

Question 6

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

Accepted Answer

Blood cell production

Question 7

During thermoregulation, which sequence correctly describes the flow of information when body temperature rises above normal?

Accepted Answer

Receptor → Control Center → Effector → Response

Question 8

Which layer of the skin contains tactile (Meissner) corpuscles responsible for detecting light touch?

Accepted Answer

Papillary layer of the dermis

Question 9

A person has a mole that is asymmetrical, has irregular borders, and is larger than 6 mm. Which type of skin cancer should be suspected?

Accepted Answer

Malignant melanoma

Question 10

Which of the following glands is responsible for producing sebum?

Accepted Answer

Sebaceous gland

Question 11

If the migration of keratinocytes from the stratum basale to the stratum corneum takes 40 days, and the epidermis is 0.1 mm thick, what is the average migration rate per day in mm?

Accepted Answer

$$0.0025\ \mathrm{mm/day}$$

Question 12

Which structure is found only in thick skin and not in thin skin?

Accepted Answer

Stratum lucidum

Question 13

Which type of sweat gland is most responsible for thermoregulation?

Accepted Answer

Eccrine sweat gland

Question 14

A patient’s skin shows yellow-orange pigmentation due to excessive consumption of carrots. Which pigment is responsible for this change?

Accepted Answer

Carotene

Question 15

Which of the following best describes the function of the nail plate?

Accepted Answer

It protects the distal tips of the fingers and toes from trauma

Question 16

Which cell type in the epidermis is responsible for producing the pigment that gives skin its color?

Accepted Answer

Melanocyte

Question 17

Which of the following is a correct description of the stratum basale?

Accepted Answer

It contains actively dividing keratinocytes

Question 18

Which of the following is a function of vitamin D synthesis in the skin?

Accepted Answer

It aids in calcium absorption for bone health

Question 19

A patient has a wound that only affects the epidermis. What is the most likely outcome?

Accepted Answer

Rapid healing without scarring

Question 20

Which of the following best explains why the superficial layers of the epidermis are avascular?

Accepted Answer

They are too far from blood supply and consist of dead cells

The Integumentary System: Structure, Function, and Pathology

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