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Biology II
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motor neurons
neurons that deliver impulses (messages) from the brain to the muscles; stimulate skeletal muscle fibers to contract
action potential
an electrical impulse that travels through a motor neuron
neuromuscular junction
where a motor neuron and a muscle fiber come together
axon terminal
the end of the axon of a neuron (send an impulse away)
synaptic cleft
the space between the axon terminal of a motor neuron and a muscle fiber
neurotransmitter
a chemical message relased by neurons
ACh
acetylcholine
the neurotransmitter that motor neurons use to tell skeletal muscles to contract