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When You Voluntarily Pick Up a Glass of Milk, Your

Question 13

Multiple Choice

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.

Correct Answer: