Question

question 2 of 6
drugs that affect the brain by increasing __________ activity are the most commonly misused ones.
○ insulin
○ melatonin
○ dopamine
○ adrenaline

Explanation:

Drugs that increase dopamine activity in the brain are highly addictive and commonly misused as dopamine is associated with the brain's reward - system. Insulin is related to blood - sugar regulation, melatonin to sleep - wake cycles, and adrenaline to the body's fight - or - flight response.

Answer:

C. dopamine