Composition and content of harmful chemicals inhaled by secondhand smoke and direct smokers.

Secondhand smoke includes both mainstream smoke from smokers and sidestream smoke coming straight out of paper cigarettes, cigars, or pipes. Secondhand smoke contains more than 4,000 substances, including more than 40 cancer-related toxins. In secondhand smoke, the release rate of many compounds in sidestream smoke tends to be higher than in mainstream smoke.

The World Health Organization's report shows that the harm of smoking to humans is multifaceted, mainly causing asthma, pneumonia, lung cancer, high blood pressure, heart disease and reproductive development. Among them, second-hand smoke is no less harmful to passive smokers than active smokers, especially to children and adolescents. Surveys show that in our country, the main victims of passive smoking are women and children, who are often exposed to second-hand smoke in their homes and public places, although they do not smoke themselves.

In addition, workplaces and venues often become places where secondhand smoke is rampant. Although cigarettes are not smoked directly, they can still cause harm to the body when inhaled into the body, even more harmful than smokers.

You just need to know that it's not good, you know what kind of poison you have, you can't solve it, it's still useless, and you can't associate with people who smoke.

It is estimated that there are hundreds of harmful chemical components, all of which are in the tar, and the tar is in the smoke, and the direct smoker generally spits it out immediately after taking a puff, so most of it is in the air

See what kind of cigarettes you smoke? Then look at the top of your cigarette case.

Hello, dear, second-hand smoke is so harmful that in addition to this rotten year, it will also cause others. You get to know it. As we all know, smoking is not only harmful to oneself, but also to others.

Secondhand smoke causes many health hazards, including increasing the risk of cardiovascular disease, cancer, respiratory diseases in adults, aggravating the severity of asthma in children, causing pneumonia in children, otitis media and even behavioral problems. Especially for pregnant women and adolescents, there is a greater harm. 1. Secondhand smoke can cause severe cardiovascular toxicity and lead to heart disease from smoking, which applies not only to true smokers, but also to non-smokers exposed to secondhand smoke.

Exposure to secondhand smoke can cause acute coronary heart disease, and even short-term exposure to secondhand smoke increases the risk of coronary heart disease. The harmful substances in secondhand smoke can cause serious cardiovascular toxicity, damage the normal function of the heart, blood and vascular systems, and increase the risk of cardiovascular events. Secondhand smoke exposure can also worsen heart attacks and increase the risk of death.

Neal L., Director of the Brandland Center of Excellence for Secondhand Smoke at the University of California, California Pilot Medical Institute, Old MeetinghillDr. Bennowitz says exposure to secondhand smoke causes you to inhale the same chemicals as active smoking, and for a longer period of time than active smoking. Experimental studies have shown that:

Non-smokers exposed to secondhand smoke can detect platelet activation and impaired blood vessel function within a few minutes, some of which can last for hours. 2. The dangers of secondhand smoke to memoryTerence O'Neill and Tom Hefernand, members of the Drug and Alcohol Research Group at the University of Northumbria, compared the memory of 27 smokers with two groups of nonsmokers. The first group consisted of 27 non-smokers who regularly inhaled secondhand smoke.

They either live with the smoker or spend a lot of time with the smoker. Exposure to secondhand smoke averages 25 hours a week over about four and a half years. The second group of 29 non-smokers was infrequently exposed to second-hand smoke.

The researchers tested the prospective memories of three groups of volunteers in two ways, namely memories of future events and activities. One of the tests is to ask volunteers to participate in an activity after remembering a specific time, and the other is to ask them to remember an event or activity in the future. Non-smokers who were regularly exposed to secondhand smoke scored 20% lower on memory tests than the other group of non-smokers.

Smokers scored 30% lower than non-smokers who were less likely to be violent in a two-to-smoke environment. 3. The harm of second-hand smoke to pregnant women: 90% of pregnant women who passively smoke second-hand smoke can detect nicotine and other harmful substances in the uterine amniotic fluid, indicating that tobacco smoke directly pollutes the uterine environment of fetal growth. Secondhand smoke exposure is an important risk factor for pregnancy-induced hypertension and pregnancy complications in pregnant women. At the same time, tobacco exposure has a serious impact on the health of the fetus from the fetal period.

Secondhand smoke exposure also affects the proliferation and differentiation of embryonic cells, resulting in abnormal postembryonic development, manifested in developmental disorders of the nervous system and intrauterine growth retardation. Second-hand smoke is a serious hazard, avoid exposure to second-hand smoke!

What is not a hazard of secondhand smoke is:

1.Non-smokers are not in the vicinity of smokers: Non-smokers will not inhale smokers' smoke if there is sufficient distance between them and smokers.

2.Smokers smoke outdoors: If smokers smoke outdoors with good air circulation, non-smokers usually do not inhale smokers' smoke and are therefore not harmed by secondhand smoke.

3.Non-smokers will not inhale smoke from smokers in separate spaces: Non-smokers will not inhale smoke from smokers if smoke does not enter the private space where the non-smoker is located, such as if there is good ventilation or if the person is in a separate room.

Secondhand smoke, also known as passive smoking and ambient tobacco smoke, refers to the mixture of smoke released from the burning end of cigarettes or other tobacco products and exhaled by smokers.

Not equal. Secondhand smoke, also known as passive smoking, ambient tobacco smoke, is a mixture of smoke released from the burning end of cigarettes or other tobacco products and exhaled by the smoker.

Secondhand smoke is actually made up of two types of smoke, one is the smoke exhaled by the smoker, known as mainstream smoke; One is the smoke produced when cigarettes are burned, which is called sidestream smoke. Non-smokers are secondhand smoke, no matter what kind of smoke they inhale.

Studies have pointed out that secondhand smoke contains more than 4,000 harmful chemicals such as tar, ammonia, nicotine, suspended particulates, polonium-210 and dozens of carcinogens.

Expand the capital to prepare for the spring.

Secondhand smoke is harmful to women in three ways.

Exposure to secondhand smoke in the home can lead to a significant increase in male hormone levels, a significant increase in the incidence of metabolic syndrome, and a higher rate of miscarriage after conception in women with polycystic ovary syndrome (PCOS).

According to the statistics of the World Health Organization in 2015, there are more than 300 million smokers in China, and as many as 100 million people are exposed to second-hand smoke, of which 100 million are women of childbearing age. Tobacco combustion produces more than 7,000 smoke chemicals, of which at least 250 are harmful substances and more than 50 are carcinogens.

These harmful substances mainly include nicotine, tar, carbon monoxide, amines, phenols, alkanes, alcohols, polycyclic aromatic hydrocarbons, nitrogen oxides and heavy metal elements nickel and cadmium, as well as organic pesticides.

A: Secondhand smoke refers to the side stream produced by the combustion of tobacco.

Cigarettes and mainstream cigarettes exhaled by smokers. Second-hand smoke contains:

A variety of toxic substances can increase lung cancer, heart disease, chronic.

The risk of respiratory diseases can be as similar to that that of cervical cancer, breast.

Carcinoma, the occurrence of bladder cancer, is also associated with the middle ear in children.

Infection, tracheitis and bronchial asthma are associated with it. Pregnant women pick up.

Exposure to secondhand smoke can lead to low birth weight and even flare-ups in infants.

Miscarriage. These reasons are enough to make us respectful of secondhand smoke. Far away.

There are many harmful substances in the smoke of cigarette burning, which of the following substances is the main source of addiction () aNicotine.

b.Tar. c.Benzoand destroys the zipyrene.

d.Hydrocyanic acid.

e.Carbon oxide for more than one lifetime.

The absolute answer is a

The reason why smoking is harmful to health is that there are many chemicals in the smoke inhaled, among which the main toxic components such as nicotine and tar are very harmful to health.

In the process of combustion, tobacco produces many substances, such as nicotine, carbon dioxide, carbon monoxide, tar, heavy metal salts, etc., among which nicotine is toxic and makes people dependent; Carbon monoxide is toxic, its toxicity is reflected in the fact that it can bind to hemoglobin in the blood, once it is difficult to separate, hemoglobin can no longer transport oxygen, resulting in serious lack of oxygen and death of tissues and organs in the body; Tar adheres to the lungs, and heavy metal salts can poison human proteins.

The smoke of cigarettes contains hundreds of toxic substances, one of which readily binds to hemoglobin in the blood, and this substance is:

a．co2 b．so2 c．co d．no2

Answer: c. CO is very easy to bind to hemoglobin, so that hemoglobin can no longer bind to O2, and people will die of hypoxia suffocation.

Analysis: When cigarettes are burned, carbon dioxide, carbon monoxide, cigarette tar, nicotine and other substances can be generated, and the solution is analyzed according to the principle of carbon monoxide poisoning

Answer: In the composition of cigarette smoke, carbon monoxide can bind to hemoglobin, and once combined, it is difficult to separate, so that oxygen has no chance to combine with hemoglobin, so that the blood loses the ability to transport oxygen, and people will die of hypoxia suffocation

Therefore, the answer is: CO is very easy to bind to hemoglobin, so that hemoglobin can no longer bind to O2, and people will die of hypoxia suffocation

Comments: This question examines the toxicity of carbon monoxide, understands the harm of smoking to the human body, and pays attention to the accumulation and grasp the properties and uses of common gaseous substances in ordinary learning

Carbon monoxide is a compound composed of two elements, carbon and oxygen, and belongs to oxides

Therefore, b

d. Harm of smoking to human health: Smoking can harm people's health. Cigarettes contain nicotine, tar and carbon monoxide and other harmful substances can damage the human respiratory system, nervous system, long-term smoking, will weaken people's respiratory function, memory decline, and even cause cancer.

Smoking in adolescents not only affects the development of the lungs, but also triggers coughing and bronchitis.