Three chronic marijuana users-a light user,a moderate user,and a heavy user-stop using marijuana.Before quitting,all three experienced abnormal blood flow in their brains.Several weeks later,blood flow in their brains has MOST likely:
A) returned to completely normal flow levels for all three.
B) returned to completely normal flow levels for the light and moderate users only.
C) returned to nearly normal for the light and moderate users only but remained at abnormal levels for the heavy user.
D) returned to nearly normal for all three.

Question

Quizplus · Accepted Answer

Chronic heavy marijuana use can lead to more persistent changes in brain function, so while light and moderate users may experience a return to nearly normal blood flow, heavy users might still have lingering abnormalities.

Three Chronic Marijuana Users-A Light User,a Moderate User,and a Heavy