A motor unit is most correctly described as a _____ and a motor neuron.
A) sarcomere(s)
B) myofibril(s)
C) muscle fiber(s)
D) filament(s)

Question

Quizplus · Accepted Answer

A motor unit is composed of a single motor neuron and all the muscle fibers it innervates. Therefore, the correct choice is C, which refers to muscle fibers. Choices A, B, and D are all components of muscle fibers, but do not encompass both a motor neuron and muscle fibers.

A Motor Unit Is Most Correctly Described as a _____