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Biology
23 August, 11:44
A muscle contraction usually begins when
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Kaylynn
23 August, 12:13
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For a contraction to occur there must first be a stimulation of the muscle in the form of an impulse (action potential) from a motor neuron (nerve that connects to muscle). Note that one motor neuron does not stimulate the entire muscle but only a number of muscle fibres within a muscle.
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