Assorted References. 1  cloning (in cloning) 2  cytoskeleton (in cytoskeleton) 3  fluid regulation (in excretion: Regulation of water and salt balance) 4  genetic behaviour (in genetics) 5  immune system (in immune system: Cellular defenses) 6  interaction with drugs (in drug: Mechanisms) 7  mutation (in mutation (genetics)) 8  cytology (in cytology)
Definition of neurotransmitter in English: A chemical substance which is released at the end of a nerve fibre by the arrival of a nerve impulse and, by diffusing across the synapse or junction, effects the transfer of the impulse to another nerve fibre, a muscle fibre, or some other structure.Example sentences.oun. A chemical substance which is released at the end of a nerve fibre by the arrival of a nerve impulse and, by diffusing across the synapse or junction, effects the transfer of the impulse to another nerve fibre, a muscle fibre, or some other structure.
Once the neurotransmitter is picked up by receptors in the postsynaptic membrane, the molecule is internalized in the neuron and the impulse continues. This process of nerve cell communication is extremely rapid. Neurotransmitters are chemicals that transmit messages from one nerve cell (neuron) to another.eurotransmitters can excite or inhibit neurons (nerve cells). Some common neurotransmitters are acetylcholine, norepinephrine, dopamine, serotonin and gamma aminobutyric acid (GABA).