In late adulthood, the brain shrinks and total brain mass declines, beginning at age 30 and accelerating at age 60, so that by age 80, most people have lost __________ of their peak brain mass.

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The Answer of In late adulthood, the brain shrinks and total brain mass declines, beginning at age 30 and accelerating at age 60, so that by age 80, most people have lost __________ of their peak brain mass.

In Late Adulthood, the Brain Shrinks and Total Brain Mass