tone in the muscularis mucosae induced by carbachol ( 3 mum ) in the presence of phentolamine ( 10 mum ) was inhibited by catecholamines , in a concentration-dependent manner , an effect that was competitively antagonized by propranolol.7 in the submucous plexus-longitudinal muscularis mucosae preparation of the guinea-pig oesophagus there are three types of adrenoceptor , inhibitory prejunctional alpha-adrenoceptors , excitatory postjunctional alpha-adrenoceptors and inhibitory postjunctional beta-adrenoceptors , and cholinergic neurotransmission is inhibited by catecholamines acting at both prejunctional alpha- and postjunctional beta-adrenoceptors .
C0034783
adrenoceptor
C0034784
alpha-adrenoceptors