Justin was recently traded to a new football team, and he is having a hard time remembering all the new plays because he keeps using the plays from his former team. Based on what is known about memory failures, you should conclude that Justin's problem results from:

For both men and women, the best predictor of sexual activity in old age is

a. good nutrition throughout life b. exercising regularly c. a healthy, positive attitude about sex when younger d. the amount of exposure to sexually explicit material

For both men and women, more aggressive behavior is associated with higher levels of

a. acetylcholine. b. estrogen. c. testosterone. d. dopamine.