CME CME Hair & Skin Science 2

Question 1

Which Fitzpatrick skin type describes skin that always burns and never tans?

Accepted Answer

Type I

Answer

Fitzpatrick Type I describes very fair skin that always burns and never tans, requiring extra caution with energy-based treatments.

Question 2

Hypertrichosis differs from hirsutism in that hypertrichosis refers to:

Accepted Answer

Excess hair growth unrelated to androgen influence

Answer

Hypertrichosis is generalized excess hair growth not driven by androgens, while hirsutism is androgen-dependent excess hair in women.

Question 3

The catagen phase of the hair cycle is best described as:

Accepted Answer

A transitional regression phase

Answer

Catagen is a brief transitional phase lasting 2–3 weeks during which the follicle regresses and mitotic activity ceases.

Question 4

Which hormone is most responsible for converting vellus hairs to terminal hairs in androgen-sensitive areas?

Accepted Answer

Dihydrotestosterone (DHT)

Answer

Dihydrotestosterone (DHT) is the primary androgen that stimulates conversion of vellus to terminal hairs in androgen-sensitive follicles.

Question 5

Post-inflammatory hyperpigmentation (PIH) following electrolysis is most likely in clients with which Fitzpatrick skin types?

Accepted Answer

Types IV, V, and VI

Answer

Clients with Fitzpatrick Types IV–VI have higher melanin density and are more prone to PIH after thermal or chemical skin injury.

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