Mechanism of development of tolerance to injected morphine by guinea pig ileum.
D000109:Acetylcholine / Q000378:metabolism; D000818:Animals; D004361:Drug Tolerance; D004558:Electric Stimulation; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects*; D066298:In Vitro Techniques; D008691:Methadone / Q000494:pharmacology; D009020:Morphine / Q000494:pharmacology*; D009119:Muscle Contraction / Q000187:drug effects; D009270:Naloxone / Q000494:pharmacology; D009638:Norepinephrine / Q000378:metabolism; D011955:Receptors, Drug; D012701:Serotonin / Q000378:metabolism; D013997:Time Factors
D011955:Receptors, Drug; D012701:Serotonin; D009270:Naloxone; D009020:Morphine; D000109:Acetylcholine; D008691:Methadone; D009638:Norepinephrine