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In healthy people, pulmonary venous blood has a PO2 about 5 mmHg lower than is seen...

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Medical Sciences

In healthy people, pulmonary venous blood has a PO2 about 5 mmHglower than is seen in the alveoli, which is mainly caused by:

competition with CO2 diffusion.

asthma.

diffuse interstitial fibrosis.

ventilation-perfusion inequalities.

pulmonary edema.

Answer & Explanation Solved by verified expert
4.2 Ratings (596 Votes)
1ASTHMA is a disease characterized by recurrent attacks of breathlessness and wheezing due to inflammation of the air passages of the lungsDue to the irritation swelling occurs which narrows the bronchus and bronchioles thus restricting the flow of air and producing a sound called wheeze Normal saturation of oxygen in the Alveoli and thereby arterial blood should be 92 Normal arterial oxygen pressure is 8kpa Normal arterial Co2 saturation in a healthy person ranges from 56 kpaSo the pulmonary venous oxygen pressure is 3kpa which is 5 kpa lesser than that of arterial pa02 In asthma Pa02    See Answer
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