title: The effects of morphine, pethidine and nalorphine on the isolated frog skin preparation.
mesh_terms: D000818:Animals; D001001:Anura; D004594:Electrophysiology; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D008564:Membrane Potentials; D008614:Meperidine / Q000494:pharmacology*; D009020:Morphine / Q000494:pharmacology*; D009269:Nalorphine / Q000494:pharmacology*; D010042:Ouabain / Q000494:pharmacology; D012867:Skin / Q000187:drug effects*; D014667:Vasopressins / Q000494:pharmacology
chemical_list: D014667:Vasopressins; D010042:Ouabain; D009020:Morphine; D008614:Meperidine; D009269:Nalorphine