Which of the following statements about pulmonary physiology is correct? A)The PO₂ of inspired air at sea level is approximately 159 mmHg. B)The percentage of CO₂ in the air is 0.0003. C)The percentage of O₂ in the air at sea level is the same as at high altitude. D)All of the above answers are correct

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The correct statements are: A) The partial pressure of oxygen (PO2) of inspired air at sea level is approximately 159 mmHg. B) The percentage of carbon dioxide (CO2) in the air is 0.03%, which is equivalent to 0.0003 in decimal form. C) The percentage of oxygen (O2) in the air at sea level is the same as at high altitude; what changes is the partial pressure due to changes in atmospheric pressure. Therefore, all of the above answers are correct.

Which of the Following Statements About Pulmonary Physiology Is Correct