Dictionary » P » Presynaptic membrane

Presynaptic membrane

presynaptic membrane

That part of the plasma membrane of an axon terminal that faces the plasma membrane of the neuron or muscle fibre with which the axon terminal establishes a synaptic junction; many synaptic junctions exhibit structural presynaptic characteristics, such as conical, electron-dense internal protrusions, that distinguish it from the remainder of the axon's plasma membrane.

See: synapse.

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Calcium ions

... bring about vesicles containing neurotransmitter moving towards the presynaptic membrane? Thanks in advance

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by ferrari599
Thu Nov 20, 2008 6:17 pm
Forum: Human Biology
Topic: Calcium ions
Replies: 2
Views: 4368


... I have heard the vesicles containing the neurotransmitter bind to the presynaptic membrane and release their contents but I dont understand the mechanism behind this, I mean ...

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by Ilyaas
Sun Dec 04, 2005 11:44 am
Forum: Molecular Biology
Topic: Synapse
Replies: 7
Views: 5101

Nervous system

... the insecticide would be expected to A) prevent the postsynaptic membrane from depolarizing. B) cause the presynaptic membrane to depolarize only once. C) produce uncontrollable spasms. D) increase ...

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by Mstar888
Sun May 29, 2005 4:08 pm
Forum: Human Biology
Topic: Nervous system
Replies: 4
Views: 5567

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