1.   Amphetamines can produce a psychotic effect due to an agonistic effect on dopamine receptors in the CNS.

2.   After using a PET scanner to determine how many dopamine receptors each person had, the researchers injected each with a small amount of the stimulant Ritalin.

3.   He said there was ancillary support for the association between the dopamine receptor and novelty-seeking behavior.

4.   In addictive disease, Blum contends, the brain lacks sufficient dopamine receptors and is unable to register satisfaction.

5.   Still, several recent studies have suggested that some people may be born with a defect in the gene that doles out dopamine receptors.

6.   The theory behind the study is that certain foods stimulate a transmitter in the brain called the dopamine receptor, which produces feelings of pleasure.

7.   They mimic the action of dopamine by stimulating dopamine receptors on other nerve cells.