CCP Integumentary System Anatomy 2

Question 1

Which layer of the epidermis contains cells that produce melanin?

Accepted Answer

Stratum basale

Answer

Melanocytes in the stratum basale (deepest epidermal layer) synthesize melanin, which gives skin its color.

Question 2

The protein that makes the outermost skin layer waterproof and resistant to abrasion is:

Accepted Answer

Keratin

Answer

Keratin is a fibrous structural protein that waterproofs and toughens the stratum corneum.

Question 3

Which skin appendage is primarily responsible for thermoregulation through evaporative cooling?

Accepted Answer

Eccrine sweat glands

Answer

Eccrine sweat glands secrete watery sweat over most of the body surface, cooling it through evaporation.

Question 4

The deepest layer of the dermis that connects it to underlying structures is the:

Accepted Answer

Reticular layer

Answer

The reticular layer is the deeper, thicker layer of the dermis composed of dense irregular connective tissue.

Question 5

Arrector pili muscles attach to which skin structure?

Accepted Answer

Hair follicles

Answer

Arrector pili are small smooth muscles attached to hair follicles; their contraction causes hair to stand upright (goosebumps).

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