What is "presynaptic"

Usage examples of "presynaptic".

There are a number of membrane proteins which can be phosphorylated in this way, some postsynaptic, some presynaptic, and the enzymes responsible for catalysing the phosphorylation are known collectively as protein kinases.

By the mid-1970s, they had shown that during habituation in the isolated ganglion there was a steady decrease in the amount of serotonin released from the sensory presynaptic terminal, without there being any change in the responsiveness of the postsynaptic serotonin receptors.

I know which drugs prevent the release of norepi-nephrine from the presynaptic neuron, or block its reuptake, or stop enzymes from making it at all.

There are a number of membrane proteins which can be phosphorylated in this way, some postsynaptic, some presynaptic, and the enzymes responsible for catalysing the phosphorylation are known collectively as protein kinases.

To be precise, the synapse is the site where presynaptic terminal and postsynaptic membrane are in close contact, recognizable in the photograph as characteristic dark, thick regions where the presynaptic and postsynaptic membranes virtually - but not quite - touch.

For instance, there could be a steady reduction in the amount of transmitter released by the presynaptic cell, or a modification of the receptors on the postsynaptic side to make them less responsive to a given amount of transmitter released, or both mechanisms could be operating.

He then explains the electrical - that is, physiological - response of the synapses in terms of a cascade of biochemical processes in the presynaptic neuron.

This thickening is the area of the postsynaptic membrane which contains the receptor molecules and which traps the transmitter released from the many small vesicles visible packed into the presynaptic terminal.

They found that as death approaches and anoxia sets in there's massive presynaptic activity in the CNS: the dying axons release huge amounts of chemically encoded data into the cerebro-spinal fluid.

During memory formation, transmitter (dark arrow: glutamate) released from the presynaptic side interacts with receptor (II) on the postsynaptic side, resulting in phosphorylation of membrane proteins (•) by protein kinase C (PK) and entry of calcium (Ca).