title: Opiate tolerance and cross-tolerance in the mouse vas deferens [proceedings].
mesh_terms: D000818:Animals; D004361:Drug Tolerance; D066298:In Vitro Techniques; D007981:Levorphanol / Q000494:pharmacology; D008297:Male; D051379:Mice; D009020:Morphine / Q000494:pharmacology; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects; D009294:Narcotics / Q000494:pharmacology*; D014649:Vas Deferens / Q000187:drug effects
chemical_list: D009294:Narcotics; D007981:Levorphanol; D009020:Morphine