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NEET Biology Breathing and Exchange of gases (Animal Respiration) Question Bank Self Evaluation Test - Breathing and Exchange of Gases

  • question_answer
    Smoking destroys the cilia in the respiratory passage ways. This:

    A) Makes it harder to move air in and out of the lungs.

    B) Decreases the surface area for respiration.

    C) Slows blood flow through lung blood vessels.

    D) Makes it harder to keep the lungs clean.

    Correct Answer: D

    Solution :

    [d] Debris normally gets trapped in mucus lining of the respiratory passage ways. This mucus is then swept up and away from the lungs by the action of cilia.


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