Which aspect of the activated receptor tells the brain how strong an odor is?

The ingestion of methamphetamine does NOT increase the activity of which neurotransmitter?

A. dopamine B. serotonin C. norepinephrine D. epinephrine

The concept of social contagions relative to obesity suggests that if someone close to us is obese, __________.

A. our risk of becoming obese decreases by over 75 percent B. our risk of becoming obese increases by over 55 percent C. our desire to exercise and diet increases by 50 percent D. our desire to exercise and diet decreases by 35 percent