A type of neurotransmitter that neither directly excite nor inhibit its targets.
What are neuromodulators?

Area of the brain important for decision-making and cognition; not fully developed until the mid-20s.
What is the prefrontal cortex?

A layer of cells that prevents many drugs from reaching brain tissue.
What is the blood-brain barrier?

Many drugs act by blocking receptors and are called ______.
What is an antagonist?

A neurotransmitter popularly associated with pleasure and happiness.
What is dopamine?

Area of the brain important for emotional regulation and the "fight or flight" response.
What is the amygdala?

Phenomenon by which more agonist is required to produce the same response.
What is tolerance?

This class of drug increase serotonin levels in your brain and are used to treat depression.
What are SSRIs?

This is the active ingredient in marijuana or cannabis.
What is THC?

This is known as the brain reward's center.
What is the limbic system?
Drugs that bind to opioid receptors in the dopamine system.
What are narcotics?

Other drugs act by activating receptors and are called _______
