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What are the three dangerous substances present in a cigarette?
Jessicanb
Three dangerous substances in cigarettes are:
Nicotine: a stimulant drug that increases the heart rate and blood pressure
Carbon monoxide: a poisinous gas that blocks the transport of oxygen by hemoglobin in the blood. it decreases the blood's ability to supply oxygen to its tissues, depriving the heart and other organs of the oxygen they need to function.
Tar: contains a number of compounds that have been shown to cause cancer.
However, there are 4,000 substances, including carcinogens, that can be found in cigarettes.
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∙ 10y ago
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What are the dangerous substances found in cigarettes and why are they so deadly?
There are many dangerous substances in cigarette smoke, but I will just discuss the most dangerous three of them. Nicotine is a dangerous drug because it is strongly addictive, and it also causes blood vessels to contract (technically it is a vasoconstrictor) which reduces blood circulation. Tar, also known as polycyclic aromatic hydrocarbons, is a powerful carcinogen; it causes cancer. Carbon monoxide reduces the oxygen carrying capacity of the blood (it bonds to hemoglobin and prevents it from carrying oxygen molecules).
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