Homework Answers
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□ Brain weight decreases
□ Neurofibrillary tangles appear.
Explanation- with age the brain loses the neurons, neurons dye as any other normal cell. With lost neurons the weight of the brain decreases. With aging the thickness of the cortex also decreases. Rough ER synthesize protein, and with increased age this also reduces.
Waste products can collect in the brain tissue as nrurons dye and break down, leading to abnormal changes in the brain called plaques and tangles to form.
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