What is the partial pressure of oxygen (pO_2) | vedclass

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(D) The partial pressure of oxygen $(pO_2)$ in the alveoli is approximately $104 \ mmHg$. In the deoxygenated blood arriving at the lungs via the pulm

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Higher than in the blood

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(D) The partial pressure of oxygen $(pO_2)$ in the alveoli is approximately $104 \ mmHg$. In the deoxygenated blood arriving at the lungs via the pulmonary arteries,the $pO_2$ is approximately $40 \ mmHg$. Since the partial pressure of oxygen in the alveoli $(104 \ mmHg)$ is significantly higher than the partial pressure of oxygen in the blood $(40 \ mmHg)$,oxygen diffuses from the alveoli into the blood. Therefore,the partial pressure of oxygen in the alveoli is higher than in the blood.

Column-$I$	Column-$II$
$A$. Alveoli	$i$. $0.3 \ mmHg \ PCO_2$
$B$. Deoxygenated blood	$ii$. $45 \ mmHg \ PCO_2$
$C$. Atmospheric air	$iii$. $104 \ mmHg \ PO_2$
$D$. Tissue	$iv$. $40 \ mmHg \ PO_2$

What is the partial pressure of oxygen $(pO_2)$ in the alveoli of the lungs compared to the blood?

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The blood flowing towards the lungs contains more of which of the following compared to the blood flowing away from the lungs?

Which of the following factors affect the rate of diffusion?

Analogy type question:
$(1)$ Atmospheric air enters: Inspiration :: Alveolar air released out: ..........
$(2)$ $O_2$ in alveoli: $104 \, mm \, Hg$ :: $CO_2$ in alveoli: ..........

Through which process is oxygen transported from the lungs to the tissues?

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