urine catecholamine excretion rate urine norepinephrine excretion rate 2014-08-26T11:32:20Z CHEBI:33569 CMO:0002569 JSmith The amount of norepinephrine eliminated from the body in the urine per unit time. Norepinephrine is a catecholamine hormone and neurotransmitter, secreted by the adrenal medulla and the nerve endings of the sympathetic nervous system, that causes vasoconstriction and increases heart rate, blood pressure, and blood sugar level. VT:0010605 clinical_measurement_ontology urine noradrenaline excretion rate