title: Biochemical aspects of the aging brain.
mesh_terms: D000109:Acetylcholine / Q000378:metabolism; D000375:Aging; D000544:Alzheimer Disease / Q000503:physiopathology; D001921:Brain / Q000098:blood supply / Q000378:metabolism / Q000502:physiology*; D002452:Cell Count; D003704:Dementia / Q000503:physiopathology; D004734:Energy Metabolism; D006801:Humans; D009474:Neurons / Q000502:physiology; D011941:Receptors, Adrenergic / Q000502:physiology; D011950:Receptors, Cholinergic / Q000502:physiology; D012039:Regional Blood Flow; D013702:Temporal Lobe / Q000166:cytology / Q000201:enzymology / Q000503:physiopathology; D005680:gamma-Aminobutyric Acid / Q000378:metabolism
chemical_list: D011941:Receptors, Adrenergic; D011950:Receptors, Cholinergic; D005680:gamma-Aminobutyric Acid; D000109:Acetylcholine