Anatomy & SciencesQuestion 280 of 484
Approximately how long does the anagen (active growth) phase of scalp hair typically last in a healthy adult?
a.2 to 3 weeks
b.3 to 7 years
c.10 to 15 years
d.2 to 3 months
Explanation
Anagen typically lasts about 3 to 7 years for scalp hair. The catagen transition is only 2 to 3 weeks, and telogen (resting/shedding) is about 2 to 3 months.
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