title: [Problems concerning sphincter action of the gastrointestinal tract].
mesh_terms: D000200:Action Potentials; D014670:Ampulla of Vater / Q000502:physiology; D001003:Anal Canal / Q000502:physiology; D000818:Animals; D001646:Bile / Q000378:metabolism; D002299:Cardia / Q000502:physiology; D003672:Defecation; D004068:Digestive System Physiological Phenomena; D004285:Dogs; D004322:Drainage; D004931:Esophageal Achalasia / Q000601:surgery; D004935:Esophageal Diseases / Q000503:physiopathology; D005743:Gastrectomy; D006548:Hernia, Diaphragmatic / Q000503:physiopathology; D006801:Humans; D009119:Muscle Contraction; D009130:Muscle, Smooth / Q000502:physiology* / Q000503:physiopathology; D011708:Pylorus / Q000502:physiology / Q000503:physiopathology / Q000601:surgery; D012007:Rectum / Q000601:surgery