For example, in high concentrations, nicotine decreases blood pressure and heart rate. Likewise, in low concentrations, nicotine stimulates the cardiovascular system by increasing blood pressure and heart rate. These facts have been supported by allowing smokers to undergo an electroencephalographic analysis. When smokers are placed in stressful situations, nicotine acts as a depressant. On the other hand, during times of depression, nicotine has a stimulating effect.
Dopamine is a neurotransmitter found in the limbic system that controls emotional responses.
Experiments have shown that the limbic system is associated with pleasure and pain. I would like to end this paper by discussing two research projects that I believe are very important. This study is important because the proportion of women smokers compared to the general population is growing. Additionally, research has shown that the menstrual cycle may effect the dietary intake of women. As stated earlier, nicotine has the effect of suppressing the appetite.