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About: Active zone     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:Science105999797, within Data Space : dbpedia.org associated with source document(s)

Type: Thingyago:Abstraction100002137yago:Anatomy106057539yago:Biology106037666yago:Cognition100023271yago:Content105809192yago:Discipline105996646yago:KnowledgeDomain105999266yago:LifeScience106037298yago:Morphology106078327yago:NaturalScience106000400yago:PsychologicalFeature100023100yago:Science105999797 New Facet based on Instances of this Class

The active zone or synaptic active zone is a term first used by Couteaux and Pecot-Dechavassinein in 1970 to define the site of neurotransmitter release. Two neurons make near contact through structures called synapses allowing them to communicate with each other. As shown in the adjacent diagram, a synapse consists of the presynaptic bouton of one neuron which stores vesicles containing neurotransmitter (uppermost in the picture), and a second, postsynaptic neuron which bears receptors for the neurotransmitter (at the bottom), together with a gap between the two called the synaptic cleft (with synaptic adhesion molecules, SAMs, holding the two together). When an action potential reaches the presynaptic bouton, the contents of the vesicles are released into the synaptic cleft and the relea