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events of muscle contraction ORDER
action potential arrives at axon terminal
calcium ions enter axon terminal
synaptic vesicles fuse to membrane of axon terminal
acetylcholine is released into synaptic cleft
acetylcholine binds to receptor sites
motor end plate is depolarized
action potential is intiiated on sarcolemma
action potential multiplies along sarcolemma and down T tubules
calcium ions released from terminal cisternae
muscle cell contracts