Excessive senile plaques and neurofibrillary tangles in the brains of people with Alzheimer's disease are likely due to:
A) increased dopamine and serotonin activity.
B) abnormal beta-amyloid and tau protein activity.
C) exposure to toxic chemicals from one's environment.
D) cerebrovascular damage caused by high blood pressure.

Question

Quizplus · Accepted Answer

Senile plaques are primarily composed of beta-amyloid protein, and neurofibrillary tangles are composed of tau protein. In Alzheimer's disease, these proteins become abnormally processed, leading to their accumulation in the brain, which is a hallmark of the condition.

Excessive Senile Plaques and Neurofibrillary Tangles in the Brains of People