Question

which chemical is released by brain cells along an activated reward pathway? (1 point)
heroin
methamphetamine
dopamine
cocaine

Explanation:

Dopamine is a neurotransmitter released by brain cells in the reward - pathway when it is activated. Heroin, methamphetamine, and cocaine are drugs that can affect the reward - pathway but are not the chemical released by brain cells in the normal activation of the pathway.

Answer:

dopamine