12th Class Biology Sample Paper Biology - Sample Paper-8

  • question_answer
    There is a statutory warning on the packets of cigarettes which warns against smoking and says that it is injurious to health. Yet, smoking is prevalent in our society. Enlist few points to advice the importance of avoiding smoking.

    Answer:

    Smoking must be avoided because of the following reasons
    · Cigarettes contain nicotine which stimulates adrenal   gland to release adrenaline and nor- adrenaline into blood. It results in increased heart rate and blood pressure.
    · Smoking is associated with the cancer of lungs, throat and oral cavity.
    · It increases carbon monoxide content in blood and causes oxygen deficiency in the body.
    · It is associated with bronchitis, emphysema, gastric cells, etc.


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