The two cell layers being referred from the question are a layer of alveolar cells and layer of endothelial cells. Gases must diffuse to these layers to proceed to the plasma. The layer of alveolar cells make up the alveolar wall while the layer endothelial cells consist the capillary wall.
I um I’m not sure I thought I had it but idk, imma do some more research and I’ll get back to u
I believe that the answer is BPD (Borderline Personality Disorder)