Which of the following areas in the brain is not a part of the endocrine system?

A 19 year old female is walking home from her friends apartment when a dog beings to follow her. The girl becomes very nervous and begins to run. Which of the following neurotransmitters is responsible for her feelings of fear?

A 19 year old female is walking home from her friends apartment when a dog beings to follow her. The girl is very nervous and begins to run. She makes it home and lays down on the couch. After a couple minutes she feels relaxed. Which of the following neurotransmitters is at a high level during relaxation?

Numerous experimental studies on prairie voles has found that which of the following neurotransmitters affect monogamy?