these results are consistent with propranolol antagonizing beta 1-adrenoceptor-mediated effects on the heart and the renin-angiotensin system that act to offset a beta 2-adrenoceptor-mediated vasodilatation , which contributes to the effects elicited by alpha-adrenoceptor antagonism .
C0001642
beta 1-adrenoceptor
C0034783
adrenoceptor