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Memory-like effects in brain reward pathway could contribute to drug addiction. The effects of nicotine upon brain regions involved in addiction mirror those of cocaine, according to new neuroscience research. A single 15-minute exposure to nicotine caused a long-term increase in the excitability of neurons involved in reward, according to a study published in The Journal of Neuroscience.
What else does nicotine do to the body? When a person smokes a cigarette, the body responds immediately to the chemical nicotine in the smoke. Nicotine causes a short-term increase in blood pressure, heart rate, and the flow of blood from the heart.irst, carbon monoxide may damage the inner walls of the arteries that encourages the buildup of fat on these walls. Over time, this causes the vessels to narrow and harden. Nicotine may also contribute to this process.