the potentiation of the vasoconstrictor effects of adrenaline was statistically significant.11 after propranolol , adrenaline was a more potent hepatic arterial vasoconstrictor than noradrenaline.12 since the beta-adrenoceptors in the hepatic arterial vasculature were not blocked by atenolol , but were stimulated by salbutamol , it is concluded that they are predominantly of the beta ( 2 ) -type.13 the vasoconstrictor actions of phenylephrine , noradrenaline and adrenaline were all antagonized by the systemic administration of phentolamine , all three dose-response curves being shifted to the right.14 the results are discussed with regard to the possible control of the hepatic arterial vasculature by naturally-occurring catecholamines .
C0028351
noradrenaline
C0014563
adrenaline