title: In vivo and in vitro studies on the physiology of penile erection.
mesh_terms: D000818:Animals; D006801:Humans; D008297:Male; D018377:Neurotransmitter Agents / Q000502:physiology; D010275:Parasympathetic Nervous System / Q000502:physiology; D010410:Penile Erection; D010413:Penis / Q000502:physiology*; D012039:Regional Blood Flow; D013564:Sympathetic Nervous System / Q000502:physiology; D009435:Synaptic Transmission
chemical_list: D018377:Neurotransmitter Agents