Tobacco (Nicotiana spp., L.) refers to a genus of short-leafed plants of the nightshade (Solanaceae) family indigenous to North and South America, or to the dried leaves of such plants. Tobacco leaves are often smoked (see tobacco smoking) in the form of a cigar or cigarette, or in a smoking pipe, or in a water pipe or a hookah. This can damage the lungs and can also potentially cause lung disorders, and contribute to existing disorders such as asthma. Tobacco can also be chewed, "dipped" (placed between the cheek and gum), or sniffed into the nose as finely powdered snuff. Many tobacco smokers and some other users become addicted and use every day.
Many plants including Tobacco and Eggplant contain Nicotine, a powerful neurotoxin that is particularly harmful to insects. However Tobacco contains a higher concentration of nicotine.All means of consuming tobacco result in the absorption of nicotine in varying amounts into the user's bloodstream, and over time the development of tolerance and dependence. Absorption quantity, frequency and speed seem to have a direct relationship with how strong a dependence and tolerance, if any, might be created. A lethal dose of nicotine is contained in as little as one half of a cigar or three cigarettes; however, only a small fraction of the nicotine contained in these products is actually released into the smoke, and most clinically significant cases of nicotine poisoning are the result of concentrated forms of the compound used as insecticides. It is important to note, however, that death can result if a small child ingests an amount as small as a cigarette butt (not including filter). Other active alkaloids in tobacco include harmala alkaloids.
Long term tobacco use carries significant risks of developing various cancers as well as strokes, and severe cardiovascular and respiratory diseases. Significantly shorter life expectancies have been associated with tobacco smoking. It has been shown that tobacco may cause lasting brain changes just like morphine or cocaine. Many jurisdictions have enacted smoking bans in effort to minimize possible damage to public health caused by tobacco smoking. The substantially increased risk of developing cancer as a result of tobacco usage seems to be due to the plethora of nitrosamines and other carcinogenic compounds found in tobacco and its residue as a result of anaerobic heating, either due to smoking or to flue-curing or fire-curing. The use of flue-cured or fire-cured smokeless tobacco in lieu of smoked tobacco reduces the risk of respiratory cancers but still carries significant risk of oral cancer. In contrast, use of steam-cured chewing tobacco (snus), avoids the carcinogenicity by not generating nitrosamines, but the negative effects of the nicotine on the cardiovascular system and pancreas are not ameliorated. Approximately 440,000 people die every year in the United States from tobacco, and also 3000 die every year from second-hand smoke, and 1000 unborn children die every year as of tobacco smoking mothers, in addition to those born live yet with defects.
2007-03-28 10:15:20
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answer #1
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answered by Anonymous
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Some names for smokeless tobacco are snuff, chew, rub, chaw, leaf, and dip.These names do not apply to all types of smokeless tobacco however. Snuff, rub,and dip apply to products such as Skoal or Copenhagen. Chew applies to pouchtobacco, such as Red Man and other products.
tobacco, such as Red Man and other products.
2014-03-14 04:30:06
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answer #2
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answered by Anonymous
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In this period of polital correctness, it probably fresh to return proper out with it. A intelligent title probably "Death Merchant." People who purchase tobacco merchandise now days both KNOW of the dangerous results and selected to disregard them, or search solace for his or her use via their denial. Go forward and poke a laugh at your self, the customers, AND the Political Correct Police.
2016-09-05 18:47:01
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answer #3
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answered by ? 4
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Nicotiana tabacum is the botanical name
2007-03-28 02:57:57
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answer #4
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answered by J P 7
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