Some cognitive neuroscientists study brain lesions to learn more about brain functions. However, a major problem with this technique is that
a. the brain damage may extend into several areas of the brain.
b. this technique is low in ecological validity.
c. it requires using a radioactive chemical, which may be dangerous.
d. it cannot be used in studying humans or other primates.
Ans: a
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Insulin is a hormone secreted by the pancreas. What role does it play in the body?
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