title: Attempts to transfer tolerance in rats treated chronically with morphine.
mesh_terms: D000818:Animals; D001923:Brain Chemistry / Q000187:drug effects; D004361:Drug Tolerance; D004597:Electroshock; D005260:Female; D006801:Humans; D007274:Injections, Intraperitoneal; D009020:Morphine / Q000494:pharmacology*; D009021:Morphine Dependence; D051381:Rats; D014020:Tissue Extracts / Q000008:administration & dosage / Q000494:pharmacology
chemical_list: D014020:Tissue Extracts; D009020:Morphine