Question: Which of the following is an example of the boundary layer phenomenon? a) Increased rate of blood flow past a liver cell will allow carbon dioxide to diffuse out of that cell faster b) Increased rate of diffusion of oxygen into a cell will cause an increased rate of diffusion of carbon dioxide out of that cell c) Increased pumping of calcium into a cell will allow calcium to diffuse faster into that cell d) Increased thickness of a cell membrane will slow down diffusion of water (osmosis) across that membrane