title: Effects of postulated neurohumoral transmitters on the isolated radula protractor of Busycon canaliculatum.
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D000818:Animals; D066298:In Vitro Techniques; D008959:Models, Neurological; D009119:Muscle Contraction / Q000187:drug effects; D009132:Muscles / Q000187:drug effects*; D018377:Neurotransmitter Agents / Q000494:pharmacology*; D012908:Snails; D009435:Synaptic Transmission; D014363:Tryptamines / Q000494:pharmacology
chemical_list: D018377:Neurotransmitter Agents; D014363:Tryptamines; D000109:Acetylcholine