Part one of term paper
Smokers generally feel more comfortable after that especially important first cigarette of the day. Within just a few seconds of "lighting up," smoking activates mind-altering changes. Smokers are well aware of the long-term risks of their habit: such as lung cancer, heart disease, emphysema, and other deadly illnesses. However, smokers ...

Part two of term paper
... on the surface of the brain; the same "keyholes" as acetylcholine(an important neurotransmitter), and mimicking epinephrine and norepinephrine, giving the smoker a rush, or stimulation. Within 30 minutes, smokers feel their energy begin to decline, as the ingested nicotine is reduced. This process continues, as the smoker's attention becomes increasingly focused on cigarettes. Nicotine causes smokers' brain cells to grow more nicotinic receptors than normal; therefore, the brain may functi ...