The Census Bureau can also provide statisics and demographics cor the years 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 and 2009 on their website.
dopamine. n. 1. (Biochemistry) a chemical found in the brain that acts as a neurotransmitter and is an intermediate compound in the synthesis of noradrenaline.oun. 1. dopamine-a monoamine neurotransmitter found in the brain and essential for the normal functioning of the central nervous system; as a drug (trade names Dopastat and Intropin) it is used to treat shock and hypotension.
Dopamine regulates the reward system in the brain. Naturally occurring neurotransmitters, such as serotonin, norepinephrine, epinephrine, and dopamine, are also called endogenous ligands. Various drugs can mimic endogenous ligands. It is by mimicking endogenous ligands that many drugs of abuse produce their effects.