blood hormone amount blood epinephrine amount CMO:0001008 CMO:0002375 The proportion, quantity, or volume in whole blood, serum, or plasma of this catecholamine hormone that stimulates the adrenergic receptors and that causes systemic vasoconstriction and gastrointestinal relaxation, stimulates the heart, and dilates bronchi and cerebral vessels. Trait.ontology VT:0005660 blood adrenaline amount blood epinephrine level circulating adrenaline level circulating adreniline concentration