A) Na ions
B) Ca ions
C) K ions
D) Mg ions.
Correct Answer: B
Solution :
: is the key to synaptic vesicle fusion and discharge. An action potential reaching the presynaptic terminal opens voltage-gated\[C{{a}^{2+}}\]channels, and the resulting\[C{{a}^{2+}}\]influx triggers release. The\[C{{a}^{2+}}\]content is then restored to the resting level by rapid sequestration and removal from the cell, primarily by a \[C{{a}^{2+}}-N{{a}^{+}}\]antiport.
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