Rank the sequence of events at the nmj that initiate an action potential in the muscle fiber, from first to last.
- action potential arrives at the axon terminal.
- acetylcholine binds to its receptors on the junctional folds.
- calcium ions enter the axon terminal.
- synaptic vesicles fuse to membrane of axon terminal.
- junctional folds become depolarized.
- action potential is initiated on the sarcolemma.
- acetylcholine is released into the synaptic cleft.
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