The partial pressure of oxygen in the alveoli | vedclass

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Question

(B) The exchange of gases occurs by simple diffusion based on pressure gradients. In the alveoli,the partial pressure of oxygen $(pO_2)$ is approximat

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more than that in the blood

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(B) The exchange of gases occurs by simple diffusion based on pressure gradients. In the alveoli,the partial pressure of oxygen $(pO_2)$ is approximately $104 \ mmHg$,while in the deoxygenated blood arriving at the lungs,the $pO_2$ is approximately $40 \ mmHg$. Since the $pO_2$ in the alveoli $(104 \ mmHg)$ is significantly higher than the $pO_2$ in the blood $(40 \ mmHg)$,oxygen diffuses from the alveoli into the blood. Therefore,the partial pressure of oxygen in the alveoli is more than that in the blood.

The partial pressure of oxygen in the alveoli of the lungs is

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