Morphine tolerance and supersensitivity to 5-hydroxytryptamine in the myenteric plexus of the guinea-pig.
D000818:Animals; D004305:Dose-Response Relationship, Drug; D004361:Drug Tolerance; D004558:Electric Stimulation; D006168:Guinea Pigs; D006801:Humans; D007082:Ileum / Q000294:innervation; D066298:In Vitro Techniques; D009021:Morphine Dependence; D009119:Muscle Contraction / Q000187:drug effects; D009197:Myenteric Plexus / Q000187:drug effects*; D012701:Serotonin / Q000494:pharmacology*; D009435:Synaptic Transmission / Q000187:drug effects
D012701:Serotonin