When drugs activate the brain’s pleasure circuit, what neurotransmitter is involved?

A substance intended to affect the structure or function of the body or mind through chemical action is

In a synergistic drug interaction

Using a drug for a purpose other than that for which it is intended is

The interaction of two or more drugs at the same receptor site in which one blocks the action of the other is

Therapeutic communities are a type of

Psychoactive drugs have which type of effect on the body?

If a change in environment resulted in the death of mycorrhizal fungi in an area, what impact would this have on the growth of plants in the area? Plant growth would [a] because mycorrhizal fungi [b].

Match each of the organs to its role in the digestive system.

The interior of the stomach is acidic, with a pH around 4. How does the acidity of the stomach contribute to digestion?