the effect of locally applied releasing hormones , thyrotropin-releasing hormone ( trh ) and luteinizing-hormone-releasing hormone ( lhrh ) and the putative neurotransmitters , acetylcholine ( ach ) and dopamine ( da ) , on the neuronal excitability of identified invertebrate giant dopaminergic neurone ( gdn ) and serotoninergic neurone ( 5-ht ) ( planorbis corneus ) were investigated by intracellular recording in vitro .
C0013030
dopamine
C0282151
dopaminergic