EC EC Hair Growth and Follicle Anatomy

Question 1

Which phase of the hair growth cycle is the active growth phase during which electrolysis is most effective?

Accepted Answer

Anagen

Answer

The anagen phase is the active growth phase when the hair follicle is most vulnerable to permanent destruction by electrolysis.

Question 2

What is the name of the innermost layer of the hair shaft?

Accepted Answer

Medulla

Answer

The medulla is the innermost layer of the hair shaft, though it may be absent in fine hair types.

Question 3

Which structure at the base of the hair follicle contains the actively dividing cells responsible for hair growth?

Accepted Answer

Hair bulb matrix

Answer

The hair bulb matrix contains the rapidly dividing keratinocytes that produce the hair shaft.

Question 4

During which hair growth phase does the follicle shrink and detach from the dermal papilla?

Accepted Answer

Catagen

Answer

The catagen phase is a transitional period during which the follicle regresses and the hair stops growing.

Question 5

What percentage of scalp hairs are typically in the telogen (resting) phase at any given time?

Accepted Answer

15–20%

Answer

Approximately 15–20% of scalp hairs are in the telogen resting phase at any given time.

(EC) Electrolysis Certification Practice Test