it is concluded that 1 ) the perfusion rate is a critical factor in designing experiments to test the sensitivity of caudal arteries to drugs , 2 ) the perfused mesenteric vascular bed is a useful preparation for studying sensitivity of blood vessels in hypertension , 3 ) the supersensitivity of blood vessels in the doca-salt model may be of greater importance relative to circulating catecholamines than to sympathetic innervation , and 4 ) the supersensitivity of blood vessels to norepinephrine in the doca-salt model is not due to changes in neuronal uptake , extraneuronal uptake , or membrane potential of the vascular smooth muscle cells .
C0007412
catecholamines
C0028351
norepinephrine