Which one of these factors would decrease the diffusion of a gas across the alveolar/pulmonary capillary membrane
A)an increase in the thickness of the membrane
B)an increase in the surface area of the membrane
C)an increase in the partial pressure gradient
D)the gas's smaller molecular size

Question

Quizplus · Accepted Answer

An increase in the thickness of the membrane would create a greater barrier for the gas to diffuse across, therefore decreasing the diffusion of the gas. The other options would likely increase the diffusion of the gas.

Which One of These Factors Would Decrease the Diffusion of a Gas