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nervous system signaling traveling:
an electrical signal travels along a neuron (nerve cell). At its ending, the neuron releases a neurotransmitter, a chemical messenger that crosses a small gap to a nearby cell
nervous system signaling traveling example:
a motor neuron releases acetycholine (ACh) at the neuromuscular junction, the connection between a motor neuron and skeletal muscle fiber. ACh helps trigger muscle contraction.
how quick the nervous system response begins:
rapidly. a nerve signal can trigger muscle contraction within a fraction of a second. and it usually lasts
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