The release of chemical messenger from synaptic vesucles is under the influence of which of these ion (s) ?
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When an impulse arrives at the synaptic knob of the axon. it depolarizes the presynaptic membrane and increases its permeability to calcium ions (Ca2+). Cu2+ ions from the synaptic cleft pass into the synaptic knob via voltage-gated channels. Sudden rise in the cytosolic concentration of Ca2+ causes the release of a chemical, called neurotransmitter substance, from smalls synaptic vesicles present there into the synaptic cleft by exocytosis through the presynaptic membrane.
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The release of chemical messenger from synaptic vesicles is under the influence of these ion(s). (a) Cl+ (b) Fe++ and S++ (c) Ca++ (d) Mg++ and Sr++
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