Biology II - Muscular System: Neuromuscular Junction Vocabulary

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Biology II

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7 Terms

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motor neurons

neurons that deliver impulses (messages) from the brain to the muscles; stimulate skeletal muscle fibers to contract

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action potential

an electrical impulse that travels through a motor neuron

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neuromuscular junction

where a motor neuron and a muscle fiber come together

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axon terminal

the end of the axon of a neuron (send an impulse away)

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synaptic cleft

the space between the axon terminal of a motor neuron and a muscle fiber

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neurotransmitter

a chemical message relased by neurons

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ACh

acetylcholine

the neurotransmitter that motor neurons use to tell skeletal muscles to contract