DOPAMINE NB:sorry for the previous esssay it was sent by mistake i didn't mean to send two same essays

Essay by mrsteve June 2002

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Most people know that addiction is the cause of a social problem, a failure in character or many other things. Well, this is not true because researchers proved that drugs have a chemical that make people unable to quit addiction. This chemical is dopamine, and we will see how it works and affects one person in a minute.

Imagine one taking a shot of heroin, a puff of cigarette, a slug of whisky, a toke of marijuana or a snort of cocaine. Don't think if these things are legal or illegal, just concentrate on the chemistry of them. The moment you take one of them, trillions of poisonous molecules enter to your brain, once there they let loose of a kind of 'neurological chain reaction ricochets around the skull and rearranges the interior reality of the mind'. (Time, May 26, 1997 pp: 43)

It is known that scientists have struggled very much to discover the 'mechanism of addiction' , so one might ask some questions like 'Why do certain substances have the power to make us feel so good? Why do some people fall so easily into the thrall of alcohol, cocaine, nicotine and other addictive substances, while others can, literally, take them or leave them?'.

(Time, May 26, 1997 pp: 43)

The answer for these questions, the scientists say is very simple 'What ties all these moods alerting drugs together, they say is a remarkable ability to elevate levels of a common substance in the brain called dopamine'. (Time, May 26, 1997 pp: 43)

Many scientists say that brain areas rich in the dopamine nicotine work the work of cocaine. 'Dr. Nora Volkow of the Brookhaven National Laboratory in New York published the strongest evidence to date the surge of dopamine in addicts' brain is what triggers cocaine high.