Question

Hair turns gray or white due to

A. A decline in glandular activity
B. A decrease in the number of Langerhans cells
C. Decreased melanocyte activity
D. Decreased blood supply to the dermis

Answer 1

Hair graying is due to decreased activity of melanocytes, which produce less melanin as a person ages, leading to loss of hair color.

Step-by-step explanation:

Hair turns gray or white due to decreased melanocyte activity. Melanocytes are cells that produce melanin, the pigment responsible for hair color. As a person ages, there is a reduction in melanocyte activity, which leads to a decrease in melanin production and consequently, hair loses its color and becomes gray or white.