Which term reflects how the brain continually changes based on the demands placed on it?

An epidemiologist is about to testify to Congress on the findings of comorbidity. Which of the following points will she want to make after reviewing research on comorbidity?

a. Most mental disorders have a biological basis. b. Those with severe impairment often have more than one disorder. c. We have underestimated the role of toxins as the cause of disorders. d. The majority of mental disorders tend to "run in families" as a result of genetic anomalies.

Referring to the question above, the item that is not a discrete emotion would be more accurately described as primarily made of:

A) Affect. B) Arousal. C) Cognition. D) Impulse. E) Mood.