Question

what is a motor unit?
multiple choice
all of the muscle fibers innervated by a single motor axon
a single bundle of fascicles
a muscle unit within the epimysium
all of the axons that innervate a muscle group
all of the muscle fibers contained within a fascicle

Explanation:

A motor unit is defined as all of the muscle fibers innervated by a single motor axon. This is a fundamental concept in the study of muscle - nerve interactions in the field of physiology.

Answer:

All of the muscle fibers innervated by a single motor axon