Question

what is the definition of a \motor unit\? multiple choice a single motor neuron plus all the muscle fibers it innervates a single muscle fiber plus all of the motor neurons that innervate it all of the motor neurons supplying a single muscle a pair of antagonistic muscles all of the muscles that affect the movement of any given joint

Explanation:

A motor unit is defined as a single motor neuron and all the muscle fibers it innervates. This is a fundamental concept in the study of muscle - nerve interactions in the body.

Answer:

A. A single motor neuron plus all the muscle fibers it innervates