Footshock induced hyperthermia.
D000818:Animals; D004361:Drug Tolerance; D004597:Electroshock; D004723:Endorphins / Q000502:physiology; D005334:Fever / Q000503:physiopathology*; D008297:Male; D009020:Morphine / Q000494:pharmacology; D009271:Naltrexone / Q000494:pharmacology; D051381:Rats; D011919:Rats, Inbred Strains; D013312:Stress, Physiological / Q000503:physiopathology*
D004723:Endorphins; D009271:Naltrexone; D009020:Morphine