Alladi et al. found that can delay the age of onset of dementia by up to four years, because it appears to increase the ability of the brain to continue functioning normally despite neurodegeneration?

Which of these genetic disorders usually does not express symptoms until adulthood?

A) Tay-Sachs disease B) Sickle-cell disease C) Phenylketonuria D) Huntington's disease

Alzheimer's disease is partly characterized by

a) plaques between neurons. b) pick bodies within neurons. c) cerebellum deterioration. d) swelling of the cortex.