News tagged with tobacco smoke
Mapping the destructive path from cigarette to emphysema
From the cherry red tip of a lighted cigarette through the respiratory tract to vital lung cells, the havoc created by tobacco smoke seems almost criminal, activating genes and portions of the immune system to create inflammation ...
Jan 18, 2012 |
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Occasional marijuana use doesn't harm lungs, study finds
Smoking marijuana on an occasional basis does not appear to significantly damage the lungs, according to a new study.
Jan 12, 2012 |
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Marijuana smoke not as damaging to lungs as cigarette smoke
Using marijuana carries legal risks, but a new study shows that the consequences of occasionally lighting up do not include long-term loss of lung function, according to a new study by University of Alabama at Birmingham ...
Jan 10, 2012 |
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Researchers make less carcinogenic cigarette
(Medical Xpress) -- Though emphasizing that quitting is the best remedy to combat health problems for smokers, Cornell researchers have found a way to make cigarettes less toxic.
Jan 03, 2012 |
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Smoke free legislation linked to drop in second-hand smoke exposure among adults
(Medical Xpress) -- Levels of second-hand smoke exposure among non-smoking adults fell by almost 30 per cent after smoke free legislation was introduced in England in 2007, researchers in the Department for ...
Dec 14, 2011 |
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Many chemicals unproven to raise breast cancer risk
Women who want to reduce their risk of breast cancer may have heard they should avoid exposure to industrial chemicals but scientific evidence has so far not proven a direct link, said a US group Wednesday.
Dec 07, 2011 |
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Babies who eat fish before nine months are less likely to suffer pre-school wheeze
Children who started eating fish before nine months of age are less likely to suffer from pre-school wheeze, but face a higher risk if they were treated with broad spectrum antibiotics in the first week of life or their mother ...
Nov 22, 2011 |
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Hospital smoke-free policies should consider patient needs
While smoke-free policies on hospital grounds make sense for the objective of clean air, managing the tobacco withdrawal symptoms of hospitalized patients must also be addressed, states an article in CMAJ.
Oct 31, 2011 |
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Reversing smoke-induced damage and disease in the lung
By studying mice exposed to tobacco smoke for a period of months, researchers have new insight into how emphysema and chronic obstructive pulmonary disease (COPD) develops. In the October 14th issue of Cell they also report ...
Oct 13, 2011 |
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Second-hand smoke in china puts children at risk
The more Chinese children are exposed to secondhand tobacco smoke, the more they have symptoms like coughing at night, sneezing, phlegm without a cold, sneezing with itchy-watery eyes and impaired lung-function ...
Oct 12, 2011 |
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Role of alcohol intake and smoking on upper aerodigestive cancers
This paper provides an extensive analysis of the proportion of the risk of upper aero-digestive tract (UADT) cancers in the population (the population attributable risk) that may be due to alcohol consumption and/or smoking. ...
Sep 06, 2011 |
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Study confirms that living with a smoker increases absenteeism in school children
Children who live in households where they are exposed to tobacco smoke miss more days of school than do children living in smoke-free homes, a new nationwide study confirms. The report from investigators at Massachusetts ...
Sep 05, 2011 |
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Cigarette smoking causes more arterial damage in women than in men
The harmful effects of tobacco smoke on atherosclerosis, one of the driving forces of cardiovascular disease, are greater in women than in men. This result emerges from the large European epidemiological study (Carotid Intima ...
Medicine & Health / Cardiology
Aug 29, 2011 |
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Household smoke increases severity of bronchiolitis in babies
A study by the University of Liverpool has found that babies admitted to hospital with bronchiolitis from a household where a parent smokes are twice as likely to need oxygen therapy and five times as likely to need mechanical ...
Jul 20, 2011 |
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Hearing loss is another danger of secondhand smoke
NYU School of Medicine researchers report in a new study that exposure to tobacco smoke nearly doubles the risk of hearing loss among adolescents. The study is published in the July, 2011, issue of Archives of Otolaryngology ...
Jul 18, 2011 |
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Tobacco smoking
Tobacco smoking is the practice where tobacco is burned and the vapors either tasted or inhaled. The practice began as early as 5000–3000 BC. Many civilizations burnt incense during religious rituals, which was later adopted for pleasure or as a social tool. Tobacco was introduced to the old world in the late 1500s where it followed common trade routes. The substance was met with frequent criticism, but became popular nonetheless. German scientists formally identified the link between smoking and lung cancer in the late 1920s leading the first anti-smoking campaign in modern history. The movement, however, failed to reach across enemy lines during the Second World War, and quickly became unpopular thereafter. In 1950, health authorities again began to suggest a relationship between smoking and cancer. Scientific evidence mounted in the 1980s, which prompted political action against the practice. Rates of consumption from 1965 onward in the developed world have either peaked or declined. They however continue to climb in the developing world.
Smoking is the most common method of consuming tobacco, and tobacco is the most common substance smoked. The argicultural product is often mixed with other additives and then pyrolyzed. The resulting vapors are then inhaled and the active substances absorbed through the alveoli in the lungs. The active substances trigger chemical reactions in nerve endings which hightens heart rate, memory, alertness, and reaction time. Dopamine and later endorphins are released, which are often associated with reward and pleasure. As of 2000, smoking is practiced by some 1.22 billion people. Men are more likely to smoke than women, however the gender gap declines with younger age. The poor are more likely to smoke than the wealthy, and people of developing countries than those of developed countries.
Many smokers begin during adolescence or early adulthood. During the early stages, smoking provides pleasurable sensations and thus serves as a source of positive reinforcement. After an individual has smoked for many years, the avoidance of withdrawal symptoms and negative reinforcement become the key motivations.
For more information about Tobacco smoking, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.