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Q.Describe the effects of smoking and chewing of tobacco.
Haryana BsehBSEH Intermediate Board 2023Subjective· 3mImportance★★★★★
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Start your 14-day free trial to unlock the full solution →Tobacco use — smoked or chewed — delivers nicotine and other harmful substances that damage the cardiovascular and respiratory systems and are strongly linked to cancers of the lung and oral cavity.
Tobacco contains nicotine, an addictive stimulant, and its use has serious effects on health, whether smoked or chewed:
Effects of smoking tobacco:
- Nicotine stimulates the adrenal gland to release the hormones adrenaline and nor-adrenaline into the bloodstream, which raises blood pressure and increases heart rate.
- Cigarette smoke contains carbon monoxide, which reduces the oxygen-carrying capacity of blood by combining more readily with haemoglobin than oxygen does, causing tissue hypoxia.
- Long-term smoking is a major cause of lung cancer, chronic bronchitis, and emphysema (destruction of alveolar walls, reducing lung's gas-exchange capacity).
- Smoking significantly increases the risk of coronary heart disease, heart attacks, and stroke due to its effects on blood vessels and blood pressure.
- It also increases the risk of gastric ulcers.
Effects of chewing tobacco:
- Chewing tobacco keeps the harmful chemicals, including carcinogens, in prolonged direct contact with the tissues of the mouth, making it a major cause of oral cancers (cancer of the mouth, tongue, and throat). …
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