title: ACTH mediation of learned fear: blockade by naloxone and naltrexone.
mesh_terms: D000324:Adrenocorticotropic Hormone / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D000818:Animals; D001362:Avoidance Learning / Q000187:drug effects*; D003213:Conditioning, Psychological / Q000187:drug effects*; D004336:Drug Antagonism; D005239:Fear; D008297:Male; D009270:Naloxone / Q000031:analogs & derivatives* / Q000494:pharmacology*; D009271:Naltrexone / Q000494:pharmacology*; D051381:Rats
chemical_list: D009270:Naloxone; D009271:Naltrexone; D000324:Adrenocorticotropic Hormone