title: The effect of morphine pretreatment on the sensitivity of mouse and guinea-pig ileum to acetylcholine and to morphine.
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology*; D000818:Animals; D004361:Drug Tolerance; D004558:Electric Stimulation; D005769:Gastrointestinal Motility / Q000187:drug effects; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects*; D066298:In Vitro Techniques; D007279:Injections, Subcutaneous; D051379:Mice; D009020:Morphine / Q000494:pharmacology*; D009119:Muscle Contraction / Q000187:drug effects
chemical_list: D009020:Morphine; D000109:Acetylcholine