Endorphins: endogenous analgesics.
D000818:Animals; D001519:Behavior; D004723:Endorphins / Q000032:analysis / Q000502:physiology*; D005260:Female; D006168:Guinea Pigs; D006801:Humans; D001523:Mental Disorders / Q000134:cerebrospinal fluid; D051379:Mice; D010146:Pain / Q000134:cerebrospinal fluid / Q000503:physiopathology*; D011247:Pregnancy; D011602:Psychophysiologic Disorders / Q000134:cerebrospinal fluid; D051381:Rats; D011957:Receptors, Opioid / Q000032:analysis
D004723:Endorphins; D011957:Receptors, Opioid