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Class 11BiologyBreathing and Exchange of GasesMechanism of Breathing
Medium

Volume of thoracic chamber increases in antero-posterior and dorso-ventral axis in rabbit by

  • A
    Contraction of diaphragm and external intercostal muscles respectively
  • B
    Relaxation of diaphragm and external intercostal muscles respectively
  • C
    Relaxation of diaphragm and abdominal muscles respectively
  • D
    Contraction of abdominal muscles and relaxation of external intercostal muscles respectively
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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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