_____ trigger fusion of synaptic vesicles with the synaptic membranes of the presynaptic cell. The same stimulus also triggers ____
a) acetylcholine, endocytosis
b) Na+ ions, exocytosis
c) Ca2+ ions, endocytosis
d) Cat2+ ions, exocytosis
e) Acetylcholine, exocytosis
Answer: d) Cat2+ ions, exocytosis
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