title: Endorphins and behavior.
mesh_terms: D000818:Animals; D001362:Avoidance Learning / Q000502:physiology; D001522:Behavior, Animal / Q000502:physiology*; D001921:Brain / Q000502:physiology; D004723:Endorphins / Q000502:physiology*; D005239:Fear / Q000502:physiology; D011939:Mental Recall / Q000502:physiology; D009619:Nociceptors / Q000502:physiology; D051381:Rats; D011957:Receptors, Opioid / Q000502:physiology*; D012684:Sensory Thresholds
chemical_list: D004723:Endorphins; D011957:Receptors, Opioid