CHS CHS Trichology & Hair Science

Question 1

The hair growth cycle consists of three main phases. Which phase is the active growth phase?

Accepted Answer

Anagen

Answer

The anagen phase is when the hair follicle actively produces new hair cells, typically lasting 2–7 years on the scalp.

Question 2

What is the medulla in the context of hair structure?

Accepted Answer

The innermost core of the hair shaft

Answer

The medulla is the innermost layer of the hair shaft, composed of loosely packed cells, and may be absent in fine hair.

Question 3

Eumelanin and pheomelanin are pigments found in the hair cortex responsible for:

Accepted Answer

Hair color

Answer

Eumelanin produces brown and black tones while pheomelanin produces red and yellow tones; their ratio determines natural hair color.

Question 4

Alopecia areata is best described as:

Accepted Answer

Patchy hair loss caused by an autoimmune response

Answer

Alopecia areata occurs when the immune system mistakenly attacks hair follicles, causing sudden, patchy hair loss that can affect any area of the scalp.

Question 5

Which layer of the hair shaft is primarily responsible for its strength and elasticity?

Accepted Answer

Cortex

Answer

The cortex makes up the bulk of the hair shaft and contains keratin protein fibers and melanin, providing tensile strength and elasticity.

(CHS) Certified Hair Stylist Practice Test

(CHS) Certified Hair Stylist Practice Test

CHS CHS Trichology & Hair Science