it is suggested that cholinergic neurones of the enteric nervous system are under double adrenergic control : a stimulating effect of catecholamines mediated by excitatory beta-adrenoreceptors is counteracted by an inhibitory effect of alpha-adrenoreceptor activation by sympathetic neuromediator noradrenaline .
C0007412
catecholamines
C0028351
noradrenaline