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.
Ans: a
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Research conducted with identical twins who were raised together versus apart shows that _______
a. genes play a large role in determining body weight and shape. b. when the twins are reared apart, weight gain occurs in different body areas. c. twins raised together are more similar in body shape than those reared apart. d. the weight of twins reared apart is correlated more with their adoptive family members than it is with their twin.
Thinking about being part of a group makes it ________ that a person will offer help, even if she or he is the only person around
FIll in the blank with correct word.