Question

multiple choice question
a motor unit is comprised of a ____ and the ____ that it controls.
o the axon of a motor neuron; a single muscle fiber
o motor neuron; muscle fibers
o muscle fiber; motor neuron
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Explanation:

A motor unit is defined as a motor neuron and the muscle fibers that it controls. The motor neuron sends electrical signals to the muscle fibers to cause contraction.

Answer:

B. motor neuron; muscle fibers