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n. A substance, C8H11NO3, both a hormone and neurotransmitter, secreted by the adrenal medulla and the nerve endings of the sympathetic nervous system to cause vasoconstriction and increases in heart rate, blood pressure, and the sugar level of the blood. Also called noradrenaline.

n. A neurotransmitter found in the locus coeruleus which is synthesized from dopamine.

n. A hormone (C8H11NO3) secreted by the adrenal medulla; it also serves as a neurotransmitter, released at synapses; called also noradrenaline. Chemically it is 2-amino-1-(3,4-dihydroxyphenyl)ethanol. It is a precursor of epinephrine in the body.

n. a catecholamine precursor of epinephrine that is secreted by the adrenal medulla and also released at synapses

"This result is due to several factors: a direct release of norepinephrine from storage vesicles, the blockage of reuptake of norepinephrine once it has been released into the synaptic cleft and a decrease in norepinephrine metabolism due to inability of MAO to break down norepinephrine."

pressor    monoamine neurotransmitter    catecholamine    vasoconstrictive    vasoconstrictor   

epinephrine   

noradrenaline   

noradrenaline   

dopamine    neurotransmitter    reuptake    noradrenaline    glutamate