Lungs do not collapse between breaths and some air always remains in the lungs which can…

Biology · NEET · NTA ExamsBreathing and Exchange of Gases

Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because:

  1. There is a positive intrapleural pressure
  2. Pressure in the lungs is higher than the atmospheric pressure
  3. There is a negative pressure in the lungs
  4. There is a negative intrapleural pressure pulling at the lung walls

Answer

(D) There is a negative intrapleural pressure pulling at the lung walls

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