One of the reasons that PET scans can indicate brain activity is that very active neurons absorb more:
A) radioactive solution than less active ones
B) radio frequencies than less active ones
C) magnetism than less active ones
D) ultrasound than less active ones

Question

Quizplus · Accepted Answer

PET scans work by injecting a radioactive tracer solution into the body that is absorbed by cells and accumulates in areas with higher metabolic activity, such as the brain. Active neurons require more energy and therefore absorb more of the tracer solution, making them more visible on the PET scan.

One of the Reasons That PET Scans Can Indicate Brain