Question

multiple select question
select all that apply
what is a motor unit composed of?
□ several muscle fibers
□ a single motor neuron
□ a single muscle fiber
□ several motor neurons
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Explanation:

A motor unit is defined as a single motor neuron and all the muscle fibers it innervates. So it consists of a single motor neuron and several muscle fibers.

Answer:

A. Several muscle fibers
B. A single motor neuron