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Q What is the value of partial pressure of oxygen in alveolar air?

ID: #10039 Respiratory system 109 views
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#10039Q ID
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Respiratory systemTopic
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  • A 159 mm Hg ✔ ✖
  • B 90 mm Hg ✔ ✖
  • C 104 mm Hg ✔ ✖
  • D 45 mm Hg ✔ ✖
Correct Answer: Option C

Explanation

The partial pressure of oxygen in alveolar air is 104 mm Hg. This value is higher than its value in arterial blood, which is 40 mm Hg. Therefore, oxygen diffuses from the alveolar air to arterial blood due to the pressure gradient. This process is essential for efficient oxygen exchange in the lungs. It is important to maintain an appropriate balance of partial pressures of gases in the alveoli to ensure proper respiratory function.

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