THE TENTH AMENDMENT grants power to the state.
The tenth amendment to the constitution of United States of America was ratified on December, 1791. The amendment expresses the rights of both the federal and the states. Basically, the amendment holds that any power that is not given to the federal government is given to the state or to the people.<span />
When dopamine levels are elevated this reward pathway reinforces the use of the drug.
Dopamine is an organic chemical that is produced in our bodies, and is related to reward-motivated behavior.
The anticipation of most types of rewards increases the levels of dopamine in the brain, and many drugs also increase dopamine as well as blocking its reuptake into the neurons follow release.