Responses of the isolated ileum of the morphine-tolerant guinea pig.
D000109:Acetylcholine / Q000494:pharmacology*; D000818:Animals; D004361:Drug Tolerance; D006168:Guinea Pigs; D006584:Hexamethonium Compounds / Q000494:pharmacology*; D007082:Ileum / Q000187:drug effects*; D007279:Injections, Subcutaneous; D007977:Levallorphan / Q000494:pharmacology*; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D009130:Muscle, Smooth / Q000187:drug effects*; D009538:Nicotine / Q000494:pharmacology*; D012701:Serotonin / Q000494:pharmacology*
D006584:Hexamethonium Compounds; D012701:Serotonin; D007977:Levallorphan; D009538:Nicotine; D009020:Morphine; D000109:Acetylcholine