31. Functional studies of people with major depression show A) elevated activity in the amygdala. B) decreased activity in the amygdala. C) diminished volume in the prefrontal cortex. D) diminished volume of the hippocampus. 32. John is in the middle of a major depressive episode. His friend, Sophie, has never experienced depression and she is trying to be supportive of John. If you were to show both John and Sophie photos of people with sad or angry expressions on their face, A) structural activation studies would most likely indicate that John has a stronger and more sustained reaction in his amygdala than Sophie. B) functional activation studies would most likely indicate that Sophie has a stronger and more sustained reaction in her amygdala than John. C) functional activation studies would most likely indicate that John has a stronger and more sustained reaction in his amygdala than Sophie. D) Based on this information, both Sophie and John would probably have the same amount of activity in their amygdalas. 33. Some researchers believe that depressive symptoms (e.g., decreased pleasure and motivation) and manic symptoms (e.g., increased pleasure and motivation) may be partly explained by changes in A) the sensitivity of the reward system in the brain. B) dopamine. C) serotonin. D) tryptophan. 34. Pleasure, motivation, and energy decrease in depression and increase in mania. This suggests neurological changes in the A) amygdala. B) second messengers. C) HPA axis. D) reward system. 35. Recent research has found that ____________ appears to be high among people with mania. A) protein Kinase C B) cortisol C) alpha-dextrose D) amygdala activity  Â