synaptic vesicle

(redirected from Presynaptic vesicle)
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Related to Presynaptic vesicle: synaptic cleft, synaptic gap

synaptic vesicle

[si¦nap·tik ′ves·ə·kəl]
(neuroscience)
A small membrane-bound structure in the axon terminals of nerve cells that contains neurotransmitters and releases them by exocytosis when an action potential reaches the terminal.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Bailey and Chen (1983, 1988a) have shown that behavioral training that induces LTH of siphon withdrawal produces a significant decrease in the number, size, and presynaptic vesicle complement of active zones associated with siphon sensory neurons, as well as fewer presynaptic varicosities on the branches of siphon sensory neurons.
Serotonin is produced in the brainstems raphe nuclei and stored in presynaptic vesicles. (1) Neuronal activation causes release of serotonin into the synapse.
All hippocampal mossy fibers contain zinc in presynaptic vesicles, and [Zn.sup.2+] is co-released with glutamate (Frederickson, 1989; Frederickson and Danscher, 1990).