In a Normal Brain, the Protein Called Tau Is ________

Multiple Choice

In a normal brain, the protein called tau is ________

A) a sticky substance at the core of a plaque.
B) a neurotoxic substance that occurs in the brains of people with Alzheimer's disease.
C) acts like scaffolding, supporting a tube inside neurons and allowing them to conduct nerve impulses.
D) are misshapen and tangled, causing the neuron tube to collapse.