title: Effects of morphine on brain and spinal acetylcholine levels and nociceptive threshold in the frog.
mesh_terms: D000109:Acetylcholine / Q000032:analysis* / Q000378:metabolism; D000110:Acetylcholinesterase / Q000378:metabolism; D000818:Animals; D001921:Brain / Q000201:enzymology / Q000378:metabolism; D001923:Brain Chemistry / Q000187:drug effects*; D004056:Differential Threshold / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D005260:Female; D008297:Male; D009020:Morphine / Q000008:administration & dosage / Q000494:pharmacology*; D009269:Nalorphine / Q000494:pharmacology; D009270:Naloxone / Q000494:pharmacology; D010095:Oxotremorine / Q000494:pharmacology; D010146:Pain / Q000378:metabolism; D011893:Rana esculenta; D011930:Reaction Time / Q000187:drug effects; D012621:Seasons; D013116:Spinal Cord / Q000187:drug effects* / Q000378:metabolism
chemical_list: D009270:Naloxone; D010095:Oxotremorine; D009020:Morphine; D000110:Acetylcholinesterase; D000109:Acetylcholine; D009269:Nalorphine