title: Role of opiate receptors and endogenous ligands in nociception.
mesh_terms: D000818:Animals; D004298:Dopamine; D004723:Endorphins / Q000378:metabolism / Q000502:physiology*; D006801:Humans; D007016:Hypophysectomy; D009270:Naloxone / Q000494:pharmacology; D018377:Neurotransmitter Agents / Q000494:pharmacology; D009638:Norepinephrine; D010146:Pain / Q000503:physiopathology*; D011957:Receptors, Opioid / Q000187:drug effects / Q000378:metabolism / Q000502:physiology*; D012701:Serotonin
chemical_list: D004723:Endorphins; D018377:Neurotransmitter Agents; D011957:Receptors, Opioid; D012701:Serotonin; D009270:Naloxone; D004298:Dopamine; D009638:Norepinephrine