Which of the following is an excitatory neurotransmitter that is involved with arousal and vigilance and mood with an excess leading to anxiety problems?

Voluntary behaviors that produce rewarding or punishing consequences are called:

What will be an ideal response?

Tiana cries for several hours a day. She is having difficulty going to work and maintaining her GPA. The death of her father two weeks ago is hitting her hard. In this case, Tiana's depression is:

a. abnormal because it has lasted too long. b. normal because it has not been an extensive duration and has occurred in response to an understandable cause. c. abnormal because it has no explanation. d. normal but it would be considered abnormal if her crying bouts lasted longer on a daily basis.