Tierney just came back from seeing a neurologist. He tells you that the neurologist has scheduled a test in which images of Tierney's brain will be recorded after radioactive chemicals have been injected into his bloodstream. However, Tierney can't remember the actual name of the test that has been scheduled. It appears that his neurologist is planning: Group of answer choices

Positron emission tomography (PET) scan

Explanation:

Position emission tomography, also known as a PET scan, is a scan which purpose is to give the doctor a view of diseases in the individuals body. They reveal how the organs and tissue in the body work. This scan is done by using a radioactive drug known as tracer to carry out the scan. The PET scan is also known as an imaging test. From Tierney's description it is observed that a PET test was carried on him because radioactive chemicals were injected into his bloodstream to record the images of his brain cell.

answer; the automatic system because it is a "gut reactor"