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10th Class Science Life Processes Question Bank Life Processes

  • question_answer
    What happens when structure P contracts and flattens?

    A) Air is forced out of the lungs.

    B) The volume of the thoracic cavity increases.

    C) The rib cage moves downwards and inwards.

    D) The air pressure in the lungs increases.

    Correct Answer: B

    Solution :

    The volume of the thoracic cavity increases when the diaphragm contracts and flattens.


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