title: Blood and brain concentration of morphine and its relation to the analgesic activity in mice.
mesh_terms: D000698:Analgesia; D000818:Animals; D001923:Brain Chemistry; D004558:Electric Stimulation; D005470:Fluorometry; D008297:Male; D051379:Mice; D009020:Morphine / Q000032:analysis* / Q000097:blood / Q000494:pharmacology; D010919:Placebos
chemical_list: D010919:Placebos; D009020:Morphine