Biology 2e
Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Chapter 39, Problem 8RQ

Of the following, which does not explain why the partial pressure of oxygen is lower in the lung than in the external air?

  1. Air in the lung is humidified; therefore, water vapor pressure alters the pressure
  2. Carbon dioxide mixes with oxygen
  3. Oxygen is moved into the blood and is headed to the tissues
  4. Lungs exert a pressure on the air to reduce the oxygen pressure.

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