Question

which of these pairs is incorrectly matched?
a hair follicle - smooth muscle that contracts to move the hair
b hair shaft - the part of the hair beyond the skin
c hair root - the part of the hair buried in the skin
d hair matrix - the growth center of the hair

Explanation:

The arrector pili muscle, not the hair follicle, is the smooth - muscle that contracts to move the hair (causing goosebumps). The hair follicle is a structure in the skin from which hair grows. Hair shaft is the visible part of hair beyond the skin. Hair root is inside the skin. Hair matrix is the growth center of the hair where cells divide and grow.

Answer:

A. Hair follicle - smooth muscle that contracts to move the hair