Question

Question 25
Which one best explains how cigarettes cause lung cancers?
a. Smoking cigarettes transfers virus to the lungs that cause cancer
b. Cigarette smoking deposits tar in lungs which decreases lung capacity and therefore
c. Cigarette smoke contains carbon monoxide that accumulates in lungs to causes cancer
d. Cigarette smoke causes cells to mutate which increases their risk of becoming cancerous​

Answer 1

Answer:

b.Cigarette smoking deposits tar in lungs which decreases lung capacity and therefore.

Answer 2

c. Cigarette smoke contains carbon monoxide that accumulates in lungs to causes cancer

Chemicals, including cancer-causing compounds, are present in the particles (carcinogens) of cigarettes.

Tar is a brownish-sticky substance that stains teeth, fingernails, and lung tissue.

Carbon monoxide is a highly toxic gas.

Doctors believe smoking causes lung cancer by damaging the cells that line the lungs. When you inhale cigarette smoke, which is full of cancer-causing substances (carcinogens), changes in the lung tissue begin almost immediately. At first your body may be able to repair this damage. The level of tar increases as the item is burnt down. The last puffs on a cigarette can contain as much as twice the amount of tar as the first puffs. Tar in cigarette smoke paralyzes the cilia in the lungs and contributes to lung diseases such as emphysema, chronic bronchitis, and lung cancer. Carbon Monoxide is a colorless, odorless gas produced from the incomplete burning of virtually any combustible product. It may accumulate indoors as a result of tobacco smoking, poorly ventilated appliances, and attached garages

When you smoke, the cancer-causing substances in cigarettes, called carcinogens, begin to change the tissue in your lungs almost immediately. Over time, the cells become too damaged and can eventually develop into cancerous cells

It has no odour or colour and, in big dosages, quickly kills because it depletes the blood's oxygen supply.

Hence, Cigarette smoke contains carbon monoxide, which builds up in the lungs and causes cancer.

Hence, option C is correct.

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