Conditions of transfer of morphine tolerance by brain extracts.
D000818:Animals; D001921:Brain; D004361:Drug Tolerance; D007274:Injections, Intraperitoneal; D008297:Male; D008722:Methods; D051379:Mice; D009020:Morphine / Q000494:pharmacology*; D051381:Rats; D014020:Tissue Extracts / Q000494:pharmacology*
D014020:Tissue Extracts; D009020:Morphine