CHS CHS Trichology & Hair Science 2

Question 1

Traction alopecia is caused by:

Accepted Answer

Prolonged tension on the hair follicle from tight styles

Answer

Traction alopecia results from chronic mechanical stress on follicles from tight braids, ponytails, or extensions, which can permanently damage the follicle over time.

Question 2

What is the normal pH range of healthy hair?

Accepted Answer

4.5–5.5

Answer

Healthy hair has a slightly acidic pH of 4.5–5.5, which keeps the cuticle scales flat and closed, resulting in smooth, shiny hair.

Question 3

Porosity in hair refers to:

Accepted Answer

Hair's ability to absorb and retain moisture

Answer

Hair porosity describes how readily the hair cuticle allows moisture and chemicals to enter and be retained within the cortex.

Question 4

Which vitamin deficiency is most commonly associated with hair loss?

Accepted Answer

Vitamin D

Answer

Vitamin D deficiency has been linked to telogen effluvium and alopecia areata, as vitamin D receptors play a role in the hair follicle cycle.

Question 5

The cuticle of the hair shaft functions primarily to:

Accepted Answer

Protect the inner cortex and control moisture exchange

Answer

The cuticle is composed of overlapping scale-like cells that shield the cortex from mechanical damage and regulate moisture absorption and loss.

(CHS) Certified Hair Stylist Practice Test

(CHS) Certified Hair Stylist Practice Test

CHS CHS Trichology & Hair Science 2