Opiates, receptors and endorphins.
D000698:Analgesia; D000818:Animals; D001923:Brain Chemistry; D004723:Endorphins; D051381:Rats; D011957:Receptors, Opioid; D013552:Swine; D008083:beta-Lipotropin / Q000032:analysis
D004723:Endorphins; D011957:Receptors, Opioid; D008083:beta-Lipotropin