the block of muscarinic receptors by atropine was effective against both endogenous and exogenous acetylcholine.7 inhibitory adrenoceptors and scanty motor alpha-adrenoceptors were detected in the smooth muscle.8 strong inhibitions of motor transmission and of rhythmic activity were produced by noradrenaline ( but not by tyramine ) , by isoprenaline , and , after phentolamine , also by adrenaline and phenylephrine .
C0034783
adrenoceptors
C0034784
alpha-adrenoceptors