title: Naloxone blocks the effect of 5-hydroxy-tryptophan on passive avoidance learning in rats: implication of endogenous opiod peptides.
mesh_terms: D006916:5-Hydroxytryptophan / Q000037:antagonists & inhibitors*; D000818:Animals; D001362:Avoidance Learning / Q000187:drug effects*; D001522:Behavior, Animal / Q000187:drug effects; D003010:Clorgyline / Q000494:pharmacology; D004723:Endorphins / Q000502:physiology*; D004744:Enkephalin, Methionine / Q000031:analogs & derivatives*; D004745:Enkephalins / Q000494:pharmacology; D008297:Male; D009270:Naloxone / Q000494:pharmacology*; D051381:Rats; D012701:Serotonin / Q000502:physiology
chemical_list: D004723:Endorphins; D004745:Enkephalins; D012701:Serotonin; D009270:Naloxone; D004744:Enkephalin, Methionine; C022118:enkephalinamide-Met, Ala(2)-; D006916:5-Hydroxytryptophan; D003010:Clorgyline