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Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYBreathing and Exchange of Gases2 Marks
Question
Explain two steps in respiration.
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Answer

Two steps of respiration:
  1. Inspiration. When the intrapulmonary pressure is less than the atmospheric pressure then air is inspired
  2. Expiration. When the intrapulmonary pressure is more than the atmospheric pressure then air is expired.

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