this study was undertaken to determine which alpha adrenoceptor subtype ( s ) is involved in the activation of isolated rat aorta and mesenteric resistance vessels by norepinephrine and to ascertain whether norepinephrine-induced ca++ influx into the smooth muscle is activated by one alpha adrenoceptor subtype while intracellular ca++ release is mediated by the other subtype .
C0034784
alpha adrenoceptor
C0034783
adrenoceptor