Postganglionic nature of parasympathetic innervation of pig iris sphincter.
D000109:Acetylcholine / Q000494:pharmacology; D000818:Animals; D001285:Atropine / Q000494:pharmacology; D004558:Electric Stimulation; D066298:In Vitro Techniques; D007498:Iris / Q000294:innervation*; D009130:Muscle, Smooth / Q000294:innervation*; D009538:Nicotine / Q000494:pharmacology; D010275:Parasympathetic Nervous System / Q000502:physiology*; D010646:Phentolamine / Q000494:pharmacology; D013552:Swine
D009538:Nicotine; D001285:Atropine; D000109:Acetylcholine; D010646:Phentolamine