Question 22 / 30:  What occurs first at the neuromuscular junction before muscular contraction?
A  Calcium ions rush in and react with synaptic vesicles.
B  Motor nerve's impulse action potential arrives at axon terminal of the neuromuscular junction.
C  Synaptic vesicles fuse with cell membrane.
D  Acetylcholine released via process of exocytosis.
E  Impulse travels T-tubules and sarcoplasmic reticulum.
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ZOOL113 Muscular System

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