CLT Skin Anatomy & Physiology 2

Question 1

Which skin appendage is the primary target when performing laser hair removal?

Accepted Answer

Hair follicle bulge and bulb

Answer

Laser hair removal targets the hair follicle bulge (stem cells) and bulb (matrix cells) where melanin absorbs laser energy to destroy the follicle.

Question 2

The Fitzpatrick skin type scale classifies skin primarily based on which characteristic?

Accepted Answer

Reaction to UV exposure and tanning ability

Answer

The Fitzpatrick scale (Types I–VI) classifies skin by its response to UV exposure, specifically burning and tanning tendency.

Question 3

What is the name of the water-insoluble protein that makes up the bulk of the epidermis?

Accepted Answer

Keratin

Answer

Keratin is the fibrous structural protein produced by keratinocytes that provides the epidermis with its protective barrier properties.

Question 4

Which layer of the dermis contains the densely packed collagen bundles that give skin its tensile strength?

Accepted Answer

Reticular dermis

Answer

The reticular dermis is the deeper, thicker layer containing coarse, interwoven collagen bundles (primarily Type I) that provide tensile strength.

Question 5

Arrector pili muscles are responsible for which physiological response?

Accepted Answer

Causing hair to stand erect (goosebumps)

Answer

Arrector pili are smooth muscles attached to hair follicles; their contraction in response to cold or fear produces piloerection (goosebumps).

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