title: Psychobiology of opioids.
mesh_terms: D000109:Acetylcholine / Q000378:metabolism; D000818:Animals; D001519:Behavior / Q000502:physiology*; D001921:Brain / Q000378:metabolism / Q000502:physiology*; D001923:Brain Chemistry; D002395:Catecholamines / Q000378:metabolism; D002940:Circadian Rhythm; D003259:Consummatory Behavior / Q000502:physiology; D004361:Drug Tolerance; D004723:Endorphins / Q000037:antagonists & inhibitors / Q000235:genetics / Q000502:physiology*; D005260:Female; D006168:Guinea Pigs; D006801:Humans; D007858:Learning / Q000502:physiology; D008297:Male; D001523:Mental Disorders / Q000503:physiopathology; D051379:Mice; D018377:Neurotransmitter Agents / Q000378:metabolism; D010146:Pain / Q000503:physiopathology; D051381:Rats; D012640:Seizures / Q000503:physiopathology; D012701:Serotonin / Q000378:metabolism; D012890:Sleep / Q000502:physiology; D013312:Stress, Physiological / Q000503:physiopathology; D005680:gamma-Aminobutyric Acid / Q000378:metabolism
chemical_list: D002395:Catecholamines; D004723:Endorphins; D018377:Neurotransmitter Agents; D012701:Serotonin; D005680:gamma-Aminobutyric Acid; D000109:Acetylcholine