The firing rate of the ________ determines the strength of contraction of a muscle.
A) intrafusal muscle fibers
B) Golgi tendon organs
C) afferent fibers
D) gamma motor neurons
E) alpha motor neurons

Question

Quizplus · Accepted Answer

The firing rate of alpha motor neurons determines the strength of contraction of a muscle. Alpha motor neurons are responsible for innervating extrafusal muscle fibers, which are the main type of muscle fibers in skeletal muscles. When these alpha motor neurons fire, they cause the extrafusal muscle fibers to contract and generate force. The firing rate of the alpha motor neurons can increase or decrease in response to different signals from the brain or spinal cord, which allows for precise control over the strength of muscle contractions.

The Firing Rate of the ________ Determines the Strength of Contraction