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Class 11BiologyBreathing and Exchange of GasesMechanism of Breathing
Medium

When do inspiration and expiration take place?

  • A
    Inspiration occurs when intra-pulmonary pressure is higher than atmospheric pressure.
  • B
    Inspiration occurs when intra-pulmonary pressure is less than atmospheric pressure.
  • C
    Expiration occurs when intra-pulmonary pressure is less than atmospheric pressure.
  • D
    Expiration occurs when intra-pulmonary pressure is equal to atmospheric pressure.
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Class 11 Questions

Class 11

Biology Questions

Chapter

Breathing and Exchange of Gases

Subtopic

Mechanism of Breathing

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