San Francisco Unified School District

Sep 18, 2009 · The brain begins to respond to the mass amount of this chemical by destroying some of the chemical and shutting down the receptors so that dopamine’s message is not received. This process causes the user to use cocaine more often and larger amounts to get the same feeling as he or she received when the drug was first used. ................
................

In order to avoid copyright disputes, this page is only a partial summary.