title: The "internal sphincter": is it under sympathetic control?
mesh_terms: D000804:Angiotensin II / Q000494:pharmacology; D000818:Animals; D004285:Dogs; D004558:Electric Stimulation; D004837:Epinephrine / Q000494:pharmacology; D005260:Female; D008297:Male; D008688:Methacholine Compounds / Q000494:pharmacology; D008954:Models, Biological; D009130:Muscle, Smooth / Q000294:innervation; D009638:Norepinephrine / Q000494:pharmacology; D010643:Phenoxybenzamine / Q000494:pharmacology; D011312:Pressure; D001743:Urinary Bladder / Q000187:drug effects / Q000294:innervation*
chemical_list: D008688:Methacholine Compounds; D010643:Phenoxybenzamine; D000804:Angiotensin II; D009638:Norepinephrine; D004837:Epinephrine