Question

‘Smoking is injurious to health’
(a) Write down any two injurious/ toxic substances contained in smoke.
(b) The capacity of blood to receive oxygen is reduced in people who have this habit. Why?

Answer 1

By destroying your airways and the tiny air sacs (alveoli) located in your lungs, smoking can cause lung disease. Smoking- caused lung conditions include COPD, which entails emphysema and chronic bronchitis. In most cases of lung cancer, cigarette smoking causes.

Complete step by step answer:
The injurious and dangerous substances found in cigarette smoke are nicotine and benzopyrene. It can be dangerous to even breathe a little cigarette smoke (1- 4). At least 250 of the more than 7,000 chemicals in tobacco smoke, including hydrogen cyanide, carbon monoxide, and ammonia, are considered to be toxic (1, 2, 5). At least 69 can cause cancer among the 250 known harmful chemicals in tobacco smoke.
- Often, the tobacco does not burn so completely because the cigar wrapper is less brittle than a cigarette wrapper. This leads to higher levels of nitrogen oxides, ammonia, carbon monoxide, and tar, all of which are extremely dangerous substances.
- In people who have this habit, the ability of the blood to obtain oxygen is decreased because— Hemoglobin has a higher carbon monoxide affinity than oxygen. Therefore, it reacts with carbon monoxide and forms a solid carboxyhemoglobin compound. This carboxyhemoglobin is quite sluggish to dissociate and decreases the blood's ability to hold or obtain oxygen.

Additional information: How to quit smoking:
- Do not smoke whatsoever.
- Just keep active.
- When you have decided to use one, begin using your NRT.
- Participate in a stop- smoking program or adopt a strategy for self- help.
- Drink more juice and water.
- Drink alcohol less or not.
- Stop people who smoke.
- Stop circumstances in which you have a powerful desire to smoke.

Note:
- Nicotine is an alkaloid found mainly in tobacco in the nightshade plant family (Solanaceae) and in smaller amounts in tomatoes, potatoes, eggplants (aubergine), and green peppers.
- Cigarettes contain carbon monoxide, which, when it binds to the hemoglobin in your red blood cells, reduces the amount of oxygen available in your body, preventing oxygen from doing so.