presynaptic

American  

[pree-si-nap-tik] / ˌpri sɪˈnæp tɪk /

adjective

Physiology.

1. being or occurring on the transmitting end of a discharge across a synapse.

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Other Word Forms

• presynaptically adverb

Etymology

Origin of presynaptic

1905–10; pre- + synaptic ( def. )

Example Sentences

Synaptic versicles -- sphere-like structures that store and release neurotransmitters such as dopamine and serotonin, are found in the presynaptic terminals of neurons.

From Science Daily • Dec. 3, 2024

Synaptic vesicles at the axon terminal of the presynaptic neuron release chemical messengers called neurotransmitters into the junction; neurotransmitters then bind to receptors embedded in the membrane of the postsynaptic neuron.

From Textbooks • Jun. 9, 2022

Fusion of a vesicle with the presynaptic membrane causes neurotransmitter to be released into the synaptic cleft, the extracellular space between the presynaptic and postsynaptic membranes, as illustrated in Figure 26.15.

From Textbooks • Jun. 9, 2022

At the presynaptic juncture, there is a distinct “presynaptic dense body” or ribbon.

From Textbooks • Jan. 1, 2015

Norepinephrine and epinephrine are also transported back into the presynaptic cell.

From Textbooks • Jun. 19, 2013