title: Neural and pharmacologic factors affecting motility of the internal anal sphincter.
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D000255:Adenosine Triphosphate / Q000494:pharmacology; D001003:Anal Canal / Q000187:drug effects / Q000294:innervation*; D000818:Animals; D001341:Autonomic Nervous System / Q000033:anatomy & histology; D001626:Bethanechol Compounds / Q000494:pharmacology; D002395:Catecholamines / Q000494:pharmacology; D004246:Dimethylphenylpiperazinium Iodide / Q000494:pharmacology; D004558:Electric Stimulation; D005769:Gastrointestinal Motility; D006632:Histamine / Q000494:pharmacology; D006801:Humans; D008139:Loperamide / Q000494:pharmacology; D009020:Morphine / Q000494:pharmacology; D009119:Muscle Contraction; D009130:Muscle, Smooth / Q000187:drug effects / Q000502:physiology; D009538:Nicotine / Q000494:pharmacology; D011453:Prostaglandins / Q000494:pharmacology; D012701:Serotonin / Q000494:pharmacology; D014660:Vasoactive Intestinal Peptide / Q000494:pharmacology
chemical_list: D001626:Bethanechol Compounds; D002395:Catecholamines; D011453:Prostaglandins; D012701:Serotonin; D014660:Vasoactive Intestinal Peptide; D004246:Dimethylphenylpiperazinium Iodide; D009538:Nicotine; D008139:Loperamide; D009020:Morphine; D006632:Histamine; D000255:Adenosine Triphosphate; D000109:Acetylcholine