Part 1 of Essay
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 ....

Part 2 of Essay
.... smoker's attention becomes increasingly focused on cigarettes. Nicotine causes smokers' brain cells to grow more nicotinic receptors than normal; therefore, the brain may function normally despite the irregular amount of acetylcholine-like chemical acting upon it. The brain is reshaped: the smoker feels normal with nicotine in his system, and abnormal without it. A series of tests were conducted on nonsmokers, "active" smokers, and "deprived" smokers. The "active" smokers were given a cigarette before each t ....