Question

cpap increases simple diffusion by
shifting any fluid in the alveoli into the vascular space
reversing atelectasis
decreasing the width of the alveolar capillary membrane
all of the following

Explanation:

To determine how CPAP increases simple diffusion, we analyze each option:

1. Shifting fluid from alveoli to vascular space reduces fluid in alveoli, aiding diffusion.
2. Reversing atelectasis (alveolar collapse) increases alveolar surface area for diffusion.
3. Decreasing alveolar - capillary membrane width shortens the diffusion distance, increasing diffusion rate.

Since all these mechanisms contribute to increasing simple diffusion, the correct option is "all of the following".

Answer:

D. all of the following (assuming the options are labeled A - D with D being "all of the following")