how does the nervous tissue cause action
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Nervous tissue is the main component of the nervous system, which regulates and controls body functions. It is specialised to react to stimuli and to conduct impulses to various organs in the body which bring about a response to the stimulus.
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When a nerve impulse reaches the muscle the muscle fibre must move. The muscle cells will move by changing their shape so that they shorten. Muscle cells have special proteins that change both their shape and their arrangement in the cell in response to nervous electrical impulses. When this happens new arrangements of these proteins give the muscle cells a shorter form.
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