Question

The active stage of hair lasts from :

a) 6 months to 1 year
b) 2 to 6 years
c) 12 to 16 years
d) 24 to 50 years

Answer 1

The active stage of hair growth, called the anagen phase, typically lasts 2 to 6 years. This is the period when the hair is actively growing, followed by shorter transition and resting phases before the process begins anew.

Step-by-step explanation:

The active stage of hair, known as the anagen phase, typically lasts 2 to 6 years. During this period, cells divide rapidly at the root of the hair, which pushes the hair shaft up and out. The anagen phase can vary, but 2 to 7 years is the general range for this growth phase. After the anagen phase, hair enters the catagen phase which lasts a few weeks and then the telogen phase which is a resting period of 2 to 4 months before the cycle restarts.