When You Voluntarily Pick Up a Glass of Milk, Your

Question

When you voluntarily pick up a glass of milk, your
A) α motor neurons stimulate extrafusal muscle fibers to contract, while γ motor neurons stimulate the ends of intrafusal muscle fibers to contract.
B) γ motor neurons stimulate extrafusal muscle fibers to contract, while α motor neurons stimulate the ends of intrafusal muscle fibers to contract.
C) α motor neurons stimulate extrafusal muscle fibers to contract, while γ motor neurons stimulate the ends of intrafusal muscle fibers to relax.
D) γ motor neurons stimulate extrafusal muscle fibers to contract, while α motor neurons stimulate the ends of intrafusal muscle fibers to relax.

Accepted Answer

α motor neurons are responsible for contracting extrafusal muscle fibers, while γ motor neurons adjust the tension of intrafusal fibers to maintain sensitivity.