Tobacco addiction refers to the physical and psychological dependency created by smoking cigarettes, cigars, or pipes. People who crew tobacco can also become addicted to tobacco. When a person takes a drag off a cigarette, they are introducing more than 4,000 chemicals into their body. Of these, nicotine is a highly-addictive substance.
For every cigarette smoked, the person ingests between 1 and 2 mg of nicotine. The nicotine enters the bloodstream and goes to the brain. The nicotine acts on the smoker's brain by triggers a release of adrenaline. This rush is responsible for the body producing an increased amount of glucose. Respiration, heart rates increase, along with the person's blood pressure. This substance also temporarily inhibits the ability of the pancreas to produce insulin.
When people think about tobacco addiction, they are really addicted to the nicotine in the tobacco product. They keep smoking, even though there is a lot of evidence available pointing to the fact that continuing to use tobacco can lead to serious health consequences. Almost 35 million smokers try to give up the habit each year, and less than 10 percent of them are able to stop using tobacco for more than a month.
The reason why tobacco addictions are so hard to beat is because ingesting nicotine acts on the brain's pleasure centers. When someone smokes, the level of the neurotransmitter dopamine in the brain increases. Many smokers report getting a feeling of pleasure from this activity, and this may be due to the rising dopamine levels in the brain. It takes less than 10 seconds for a smoker to experience a "high" from smoking.
Unfortunately for the smoker in question, this feeling of pleasure is not a long-lasting one. Within a few minutes, the pleasurable sensations dissipate, which explains why the person has the urge to continue smoking.