title: The function of biliary "sphincters".
mesh_terms: D000818:Animals; D001652:Bile Ducts / Q000502:physiology*; D002766:Cholecystokinin / Q000494:pharmacology; D003549:Cystic Duct / Q000187:drug effects / Q000502:physiology; D004285:Dogs; D004386:Duodenum / Q000187:drug effects / Q000502:physiology; D006801:Humans; D009020:Morphine / Q000494:pharmacology; D009130:Muscle, Smooth / Q000187:drug effects / Q000502:physiology
chemical_list: D009020:Morphine; D002766:Cholecystokinin