title: Distribution and physiological significance of opioid receptors in the brain.
mesh_terms: D000818:Animals; D001345:Autoradiography; D001921:Brain / Q000378:metabolism*; D001923:Brain Chemistry; D000882:Haplorhini; D008032:Limbic System / Q000032:analysis; D010902:Pituitary Gland / Q000502:physiology; D051381:Rats; D011957:Receptors, Opioid / Q000032:analysis / Q000378:metabolism* / Q000502:physiology; D013116:Spinal Cord / Q000032:analysis
chemical_list: D011957:Receptors, Opioid