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ACh is released into the neuromuscular junction by the axon terminal
ACh diffuses across theneuromuscular junctionand binds to receptorson the sarcolemma
Then Depolarization happens,and the action potentialis generated. The action potential causes the SR to release calcium ions
The calcium ionconcentration at themyofilaments increases,the myofilaments slidepast one another, andthe cell contracts
As calcium is activelyreabsorbed into the SR,its concentrationdecreases at themyofilaments. Then the muscle cell relaxes and strengthens. Just like I am about to do--
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