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Transcript
• Stimulus for Contraction
Cross bridges now bind and pull on theActin
Myosin ______________
_____
filaments, causing the sarcomere to shorten.
After the nervous impulse has been received, the enzyme
Acetylcholinesterase
__________________ rapidly decomposes the
acetylecholine.
Then, calcium is returned to the sarcoplasmic reticulum,
and the linkages between myosin and actin are broken.