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Ayushree
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Asked: 2025-09-26T11:34:15+00:00 In:

Which of the following statements are correct in reference to the role of A (shown in the given diagram) during a breathing cycle in human beings? (i) It helps to decrease the residual volume of air in lungs. (ii) It flattens as we inhale. (iii) It gets raised as we inhale. (iv) It helps the chest cavity to become larger.

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Which of the following statements are correct in reference to the role of A (shown in the given diagram) during a breathing cycle in human beings? (i) It helps to decrease the residual volume of air in lungs. (ii) It flattens as we inhale. (iii) It gets raised as we inhale. (iv) It helps the chest cavity to become larger.

Poll Results

100%[A] (ii) and (iv) ( 1 voter )
0%[B] (iii) and (iv)
0%[C] (i) and (ii)
0%[D] (i), (ii) and (iv)
Based On 1 Vote

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The correct answer is [A] (ii) and (iv).
‘A’ represents the diaphragm. During inhalation, it flattens and helps the chest cavity to become larger, allowing air to enter the lungs. It doesn’t decrease residual volume.

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    1 Answer

    1. ANSWER: [A]

      Explanation: The correct answer is [A] (ii) and (iv). During inhalation, the diaphragm flattens and the chest cavity becomes larger, allowing air to enter the lungs. Residual volume never decreases, and the diaphragm is raised only during exhalation.

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