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.

PET Scan

A medical imaging technique that helps reveal how tissues and organs are functioning by using a radioactive substance called a tracer.

Radioactive Sugar

Sugars labeled with a radioactive isotope, used in scientific research to trace and study metabolic processes.

Carotid Artery

A major blood vessel that supplies blood to the brain, neck, and face.