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NEET2016ZoologyBreathing and Exchange of GasesActual

The partial pressure of oxygen in the alveoli of the lungs is:

Options

  1. AEqual to that in the blood
  2. BMore than that in the blood
  3. CLess than that in the blood
  4. DLess than that of carbon dioxide

Correct answer

B. More than that in the blood

Step-by-step solution

The partial pressure of oxygen in alveoli of lungs is 104 mm of Hg that is more than that of blood in the pulmonary artery (40 mm of Hg).

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