What change would cause a DECREASE in O2 diffusion across a respiratory interface? An increase in the surface area of the interface An increase in the diffusion coefficient for O2? An increase in the thickness of the interface An increase in the partial pressure gradient for O2? An increase in temperature
Question
What change would cause a DECREASE in O2 diffusion across a respiratory interface? An increase in the surface area of the interface An increase in the diffusion coefficient for O2? An increase in the thickness of the interface An increase in the partial pressure gradient for O2? An increase in temperature
Solution 1
An increase in the thickness of the interface would cause a decrease in O2 diffusion across a respiratory interface.
Here's why:
The rate of diffusion of a gas like O2 across a respiratory interface (like the alveoli in the lungs) is governed by Fick's Law of Diffusion. According to this law, the rate of diffusion is directly proportional to the surface area of the interface and the difference in partial pressure of the gas on either side of the interface (the partial pressure gradient). It is also directly proportional to the diffusion coefficient for the gas, which is a measure of how easily the gas diffuses through a specific medium.
On the other hand, the rate of diffusion is inversely proportional to the thickness of the interface. This means that if the thickness of the interface increases, the rate of diffusion decreases.
So, if the thickness of the respiratory interface increases, less O2 would be able to diffuse across it, leading to a decrease in O2 diffusion.
The other changes mentioned (increase in surface area, increase in diffusion coefficient, increase in partial pressure gradient, and increase in temperature) would all lead
Solution 2
An increase in the thickness of the interface would cause a decrease in O2 diffusion across a respiratory interface.
Here's why:
The rate of diffusion of a gas like O2 across a respiratory interface (like the alveoli in the lungs) is governed by Fick's Law of Diffusion. According to this law, the rate of diffusion is directly proportional to the surface area of the interface and the difference in partial pressure of the gas on either side of the interface (the partial pressure gradient). It is also directly proportional to the diffusion coefficient of the gas, which is a measure of how easily the gas diffuses through a specific medium.
On the other hand, the rate of diffusion is inversely proportional to the thickness of the interface. This means that if the thickness of the interface increases, the rate of diffusion decreases.
So, while an increase in surface area, diffusion coefficient, partial pressure gradient, or temperature would all increase the rate of O2 diffusion, an increase in the thickness of the interface would decrease it.
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