title: [On the mechanism of frequency gradient of rhythmic contractions in the small intestine of dogs].
mesh_terms: D000818:Animals; D002217:Carbachol / Q000494:pharmacology; D003864:Depression, Chemical; D004285:Dogs; D005769:Gastrointestinal Motility / Q000187:drug effects; D006584:Hexamethonium Compounds / Q000494:pharmacology; D007082:Ileum / Q000502:physiology; D007421:Intestine, Small / Q000502:physiology*; D007583:Jejunum / Q000502:physiology; D009020:Morphine / Q000494:pharmacology; D010507:Periodicity; D011343:Procaine / Q000494:pharmacology; D013268:Stimulation, Chemical; D013779:Tetrodotoxin / Q000494:pharmacology; D014628:Vagotomy
chemical_list: D006584:Hexamethonium Compounds; D013779:Tetrodotoxin; D011343:Procaine; D009020:Morphine; D002217:Carbachol