From nicotine is and the benefits

As cigarette smoke contains over 4 thousand different substances. The most famous of them, nicotine, possesses very different properties. Including useful.
Doctors from the American College Baylor undertook a study between beneficial effect of nicotine on the body and the development of dependence on smoking. According to the group of Professor of Neurology Dr. John A. Dani, nicotine is able to significantly improve memory and speed up the transmission of intercellular signals in the brain.
In practice, the rate of pulses in the brain of mice, which was injected into the body nicotine, compared with a control group of rodents was higher by nearly 200%. In addition, scientists have expressed an interesting theory of psychological (as is known, is as strong as physical) dependence on smoking.
It turns out that a smoker reaches for a cigarette in a circle of friends, after dinner or conversation in the bar, guilty of the very useful properties of harmful substances. Admission nicotine allows the brain to work faster, forcing centers to capture the memory of the circumstances under which it occurs, as positive. Thus, in the brain actually is imprinted: "Smoking is useful!". "Nicotine teaches us to smoke, so how the brain perceives it as an absolute benefit of the body," - commented Professor Dani.
Useful evil
Even in 2006, data were obtained, according to which smokers was 70% lower risk of developing Parkinson's disease. Nicotine markedly reduces the rate of development of Alzheimer's disease. In addition, it improves the condition of patients with ulcerative colitis and removes pain in many diseases of the gastrointestinal tract. It is believed that smokers rarely develop allergic reactions.
Medicine or poison
Nicotine - is an alkaloid contained in the leaves of many plants: potatoes, eggplant, tobacco, coca, etc. In small doses, it has exciting and stimulating effect on the nervous system of humans and animals, contributes to the development of adrenaline, can increase blood glucose levels. It is both physical and psychological addiction. Is a strong neurotoxin, high doses cause paralysis of the nervous system.
Kapel'ka nicotine containing 60-80 mg of pure substance is lethal for the average adult male. In one ordinary cigarette contains about 1 mg of nicotine. The proportion of 15% of this dose, injected intravenously, causing instant death. Cigar contains up to 300 mg of nicotine. If a person eats half a cigar, he would almost certainly die.
... Or drugs
In order to get into the brain from the inhaled cigarette smoke, nicotine is enough 5-8 seconds. A cigarette after rough sex - in this phenomenon is much more biochemistry than romance. The fact that physical exercise in times accelerate nicotine metabolism in the brain of a smoker.