An excitatory neurotransmitter, it causes a pleasant mood, increased attentiveness in the brain, and also causes blood vessel vasoconstriction to increase blood pressure Norepinephrine.
Neurotransmitters, a class of chemical transmitters, are important for bodily function. These carry chemical "messages" from one neuron (nerve cell) to the following target cell. Any gland, muscle, or other nerve cell could be the next target cell.
Fortunately, the majority of the work is done by the seven "small molecule" neurotransmitters acetylcholine, dopamine, gamma-aminobutyric acid (GABA), glutamate, histamine, norepinephrine, and serotonin.
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