What is the definition of a "motor unit"?
A) a single motor neuron plus all the muscle fibers it innervates
B) a single muscle fiber plus all of the motor neurons that innervate it
C) all of the motor neurons supplying a single muscle
D) a pair of antagonistic muscles
E) all of the muscles that affect the movement of any given joint

Question

Quizplus · Accepted Answer

A motor unit consists of a single motor neuron and all the muscle fibers it innervates. When the motor neuron sends a signal, all the muscle fibers in the motor unit contract together.

What Is the Definition of a "Motor Unit