What is thought to promote the development of brain senile plaques and neurofibrillary tangles?
A) oxidative stress
B) excess acetylcholine
C) dietary deficiency of choline
D) low blood levels of homocysteine
Question 2
An increase in exercise accompanied by a decrease in body weight is an example of a ____.
A) variable effect
B) positive correlation
C) negative correlation
D) randomization effect