About harm of smoking
Tobacco smoking is one of the addictions of mankind. To it are subject a large quantity of people all over the world.
In total in the world smoke on the average 50 % of men and 25 % of women, many of which yet have not reached majority.
The most harmful is which nicotine of pair get into the top respiratory ways and lungs, and also are swallowed with a saliva in a stomach.
Influence of smoking of tobacco on an organism and health of the person can have the most sad consequences.
The smoke of tobacco inhaled to smokers, contains nicotine, окись carbon, пиридин, acetic, ant, oil and hydrocianic acids and so forth
Smokers have chronic diseases of a throat and drinks, a bronchitis, a tuberculosis of lungs, a cancer of lungs, a cancer of an oral cavity, a lip.
At inhalation of a tobacco smoke tooth enamel in this connection can develop caries, stomatitises, гингивиты is damaged.
Under the influence of chronic action of nicotine on vegetative nervous system there are general vegetative frustration, gastric secretion, acidity in gastric juice raise, gastritises, a stomach ulcer develop, etc.
In connection with vasoconstrictive action of nicotine smokers can have trophic changes in vessels, эндартериит the obliterating.
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The big harm causes smoking to women. It complicates a pregnancy current, fatally influences development and fruit ability to live, leads to abortions, uglinesses of newborns, etc.
Smoking for men fraught barreness and an impotence.
Teenage smoking one of the sharpest problems of the present who against the general decrease in birth rate in our country can become a problem of national safety.
As shows the statistican, smokers at the age of 40-49 years die in 3 times more often the non-smoking.
Smoking is harmful not only to smokers, but also for the associates being with them in one premise and inhaling air, poisoned with a tobacco smoke (nicotine). As show last researches of scientists harm of passive smoking it was obviously underestimated.
Smoking and its negative consequences is told any more a little, but is possible these materials nevertheless will push some "fluctuating" to pass to actions.
Smoking and cancer of lungs
Smoking is capable not only to provoke a cancer of lungs, but also to urge on growth of already existing tumours. According to one of theories, nicotine from a cigarette smoke can stimulate division and reproduction of cancer cages in lungs.
Eliot Spindel from the Oregonsky national centre of research of primacies studied cages of people with the certain form of a tumour of lungs. He has found out in some of tumoral cages receptors for ацетилхолина. Besides, cages develop considerable quantities of this substance. Earlier ацетилхолин was considered exclusively нейротрансмиттером. But its detection in a malignant new growth has suggested an idea to scientists, that tumour cages, developing ацетилхолин, stimulate own growth – after all this substance helps to grow and share. To that acknowledgement – has been found at processing of self-stimulated cages by the atropine blocking receptors acetilholin, growth of these cages has stopped.
Usually it is considered, that smoking causes a cancer as nicotine causes mutations of cellular DNA. But besides, nicotine is the strong activator of receptors ацетилхолина so, can increase growth rate and reproduction of cancer cages.
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Smoking can cause a pancreas cancer
Active smoking increases probability of development not only a cancer easy, but also other kinds of malignant tumours - in particular, a pancreas cancer. Scientists have informed on it from Illinois.
Having analysed clinical cards of 18386 patients to which the diagnosis "a pancreas cancer" has been made, researchers from Northwest University have found out, that the number of smokers among them is essential more than on the average among healthy people. Besides, at the majority of smokers the cancer developed at earlier age, than at non-smoking people.
It is necessary to notice, that a pancreas cancer - much more dangerous tumour, than a cancer of a lung "traditional" for smokers. The lung cancer rather well gives in both medicamentous, and to surgical treatment whereas to eliminate a pancreas tumour it is practically impossible.
Smoking and alcohol provoke an oral cavity cancer
Smoking and the use of alcoholic drinks cause certain changes in cages of a mucous membrane of an oral cavity, provoking thereby development of malignant tumours. To such conclusion researchers from University of Hong Kong have come.
Having surveyed some hundreds the people who are active smokers or regularly taking alcohol, scientists have found out in them in геноме oral cavity cages a specific mutation of a gene р15, carrying out function супрессора growth and cell fission. Additional biochemical experiments have shown, that this mutation reduces activity of a gene, thereby promoting development of malignant tumours.
"The mutation found out by us meets only at several percent of healthy people, - doctor Anthony Po-Uing Jen, one of authors of this research has told in interview to the correspondent" Reuters ". - however in the event that the person regularly takes strong alcoholic drinks or actively smokes, the probability of occurrence in it of a mutation p15 increases to 60-70 percent. Certainly, it yet does not mean, that with probability of 60-70 percent it will have a malignant tumour, but completely to neglect danger it is impossible".
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