Question

alzheimer’s disease is associated with excessive amounts of beta-amyloid and tau proteins in the brain that:
○ proliferate, especially in the hippocampus.
○ have little effect on the communication channels among neurons.
○ overly stimulate the cerebral cortex.
○ prevent plaques and tangles from forming in the cerebral cortex.

Explanation:

To solve this, we analyze each option:

• Option 1: In Alzheimer’s, beta - amyloid forms plaques and tau forms tangles, and they proliferate, especially in the hippocampus (a key brain region for memory).
• Option 2: These proteins disrupt neuron communication, so "little effect" is wrong.
• Option 3: They don't overly stimulate the cerebral cortex; they disrupt function.
• Option 4: They cause plaques and tangles, not prevent them.

Answer:

A. proliferate, especially in the hippocampus.