Which of the following statements correctly describes calcium's role in exocytosis?
a. Calcium has no role in exocytosis.
b. Calcium stimulates autoreceptors.
c. Calcium frees synaptic vesicles from their protein anchors.
d. Calcium moves neurotransmitter molecules back into synaptic vesicles.
Question 2
Prior to release, synaptic vesicles are
a. anchored by proteins near their release site.
b. floating freely in the intracellular fluid of the axon terminal.
c. fused to the membrane of the axon terminal.
d. recaptured from the extracellular fluid of the synaptic gap.
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