Eyebrow hairs are always shorter than hairs on your head because ________.
A) they grow much slower
B) the vascular supply of the eyebrow follicle is one-tenth that of the head hair follicle
C) eyebrow follicles are only active for a few months
D) hormones in the eyebrow follicle switch the growth off after it has reached a predetermined length

Question

Quizplus · Accepted Answer

Eyebrow follicles have a shorter active growth phase (anagen phase) compared to scalp hair follicles, which is why they are shorter.

Eyebrow Hairs Are Always Shorter Than Hairs on Your Head