In Alzheimer's disease, the microtubules of neurons disintegrate in the absence of tau proteins, and the whole neuron shrivels and dies. The disorganized tangles of tau that are left at the end of this process are known as __________ tangles

What is a likely effect of damage to the right hemisphere of the brain?

a) makes one indifferent in emotional situations b) eliminates the ability to experience happiness c) increases the threshold for expressing emotions d) makes it difficult to remember the words used to describe different emotions

____________ neurons play a key role in cerebral activation during alert wakefulness

a. Adenosine b. Histamine c. Acetylcholine d. Serotonin e. GABA