Neurotransmitter (redirected from Neurotransmitter agents)

neurotransmitter /neu·ro·trans·mit·ter/ (-tranz´mit-er) a substance released from the axon terminal of a presynaptic neuron on excitation, which diffuses across the synaptic cleft to either excite or inhibit the target cell.

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false neurotransmitter  an amine that can be stored in and released from presynaptic vesicles but that has little effect on postsynaptic receptors.

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neu·ro·trans·mit·ter (nr-trnzmt-r, -trns-)

n.

Any of the various chemical substances, such as acetylcholine, that transmit nerve impulses across a synapse.

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Neurotransmitter

A chemical in the brain that transmits messages between neurons, or nerve cells. Changes in the levels of certain neurotransmitters, such as serotonin, norepinephrine, and dopamine, are thought to be related to bipolar disorder.

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neurotransmitter (nerˈ·ō·transˑ·mi·ter),

n chemical messenger that modifies or affects communication across synapses or neuromuscular connections. Important neurotransmitters include dopamine, serotonin, and acetylcholine.

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neurotransmitter,

n any one of numerous chemicals that modify or result in the transmission of nerve impulses between synapses. Neurotransmitters are released from synaptic knobs into synaptic clefts and bridge the gap between presynaptic and postsynaptic neurons.

Neuron.

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neurotransmitter

a substance (e.g. norepinephrine, acetylcholine, dopamine) that is released from the axon terminal of a presynaptic neuron on excitation, and which travels across the synaptic cleft to either excite or inhibit the target cell.

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adrenergic neurotransmitter

see norepinephrine.

neurotransmitter receptor

each neurotransmitter has its own receptor molecule; these show a high degree of structural homology.

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neurotransmitter Neurosynaptic transmitter Physiology Any of a number of small neuroregulating molecules–eg, catecholamines and acetylcholine, which are synthesized in the presynaptic terminals of neurons, stored in vesicles, and cause rapid and transient depolarization near their point of release in the synaptic cleft, where it stimulates production of either excitatory or inhibitory postsynaptic potentials; neurotransmission at synapses or neuromuscular junctions is due to binding of a neurotransmitter to its cognate receptor. See Amino acid neurotransmitter, Neuropeptide, Neuroregulator. Cf Hormone.