title: Mechanisms of penile erection.
mesh_terms: D000818:Animals; D001285:Atropine / Q000494:pharmacology; D001921:Brain / Q000502:physiology; D002415:Cats; D004285:Dogs; D004558:Electric Stimulation; D006439:Hemodynamics; D006801:Humans; D008297:Male; D018377:Neurotransmitter Agents / Q000494:pharmacology; D010275:Parasympathetic Nervous System / Q000502:physiology; D010413:Penis / Q000187:drug effects / Q000502:physiology*; D011817:Rabbits; D012039:Regional Blood Flow / Q000187:drug effects; D013564:Sympathetic Nervous System / Q000502:physiology
chemical_list: D018377:Neurotransmitter Agents; D001285:Atropine