title: beta-Endorphin: effects on respiratory regulation.
mesh_terms: D000818:Animals; D002245:Carbon Dioxide / Q000494:pharmacology; D004285:Dogs; D004723:Endorphins / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D008297:Male; D009270:Naloxone / Q000494:pharmacology; D012119:Respiration / Q000187:drug effects*
chemical_list: D004723:Endorphins; D002245:Carbon Dioxide; D009270:Naloxone