To measure the activity of the human brain during certain thought processes, a short-lived radioactive sugar is injected in the carotid artery and is utilized by those cells that are most active. This shows up on a PET scan and demonstrates the detection of
A) ionic bonds.
B) high levels of radiation.
C) covalent bonds.
D) neutrons.
E) isotopes.

Question

Quizplus · Accepted Answer

The short-lived radioactive sugar used in this process is an isotope, which is detected on a PET scan as it is utilized by the most active cells in the brain. None of the other choices are relevant to this process.

To Measure the Activity of the Human Brain During Certain