Anatomy & SciencesQuestion 283 of 484
A client asks why her hair is turning gray. The most accurate explanation is that:
a.Sebum production has stopped at the follicle
b.Melanocytes in the hair bulb gradually produce less melanin with age
c.The cuticle scales have flattened, blocking color from reaching the cortex
d.Hair pigment is washed out by everyday shampoo over many years
Explanation
Graying happens when melanocytes in the hair bulb slowly lose function and deposit less melanin into new hairs. New hairs grow in with less pigment until they appear silver or white.
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