Synaptic Vesicle

Synaptic Vesicle The structure indicated is a synaptic vesicle located in a presynaptic bouton. Synaptic vesicles are structures found at synaptic terminals which contain various different types of neurotransmitter, the chemicals which mediate neurotransmission. Synaptic vesicles are contained within pools within the nerve terminal. There are three types of pools: Readily releasable pool Recycling pool Reserve pool Release of synaptic vesicles is mediated by voltage-gated calcium channels. When an action potential arrives in the synaptic bouton, voltage-gated calcium channels are opened causing calcium influx into the synaptic terminal. This influx then permits fusion of vesicles to the presynaptic membrane and …

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