norepinephrine

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.

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.

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

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