When neuroscientists use PET scans (positron emission tomography),
a. they assess the regions of the brain in which blood flow increases while a person is performing a task.
b. they record the neural impulses from one neuron in the human brain.
c. they stimulate a brain region in a patient who recently had a stroke or tumor.
d. they place electrodes on a person's scalp.
Question 2
According to the discussion of cognitive neuroscience, the PET-scan technique
a. is too dangerous to use with human participants.
b. is currently used when researchers want to test memory; however, it is not adaptable for other cognitive processes.
c. can measure human cognitive processes that are completed within one-tenth of a second.
d. measures blood flow in the brain.
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