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35. At the relative end of synaptic transmission, the vesicles (containing stored neurotransmitter) migrate and fuse with the
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Answer #1

The correct option is (a), the calcium current at the axon-terminal.

It is because in the absence of calcium, the fusion of vesicles does not happen. The vesicles remain present in the fusion-ready state, but do not undergo fusion and migration.At the influx of calcium, the fusion of vesicles is initiated.

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