Nicotine is a highly addictive substance found in tobacco. It is absorbed into the body through the lungs, skin, or mouth. When inhaled, nicotine reaches the bloodstream within seconds. It then travels to the brain, where it binds to receptors that trigger the release of dopamine, a neurotransmitter that produces feelings of pleasure and reinforcement.
Table 1: Absorption Rates of Nicotine
Route of Administration | Absorption Rate |
---|---|
Inhalation | 90-95% |
Skin | 20-40% |
Mouth | 10-20% |
Table 2: Effects of Nicotine on the Body
System | Effects |
---|---|
Cardiovascular | Increased heart rate and blood pressure |
Respiratory | Bronchial constriction and increased mucus production |
Central Nervous | Stimulation and relaxation |
Endocrine | Increased release of stress hormones |
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