In active muscles, the pO2 maybe as high as 10 torr at the cell surface (in contact with the blood) and as low as 1 torr inside the mitochondria (where all the magic happens). Use the equation for fractional saturation to show how Mb (whose p50=2.8 torr) facilitates the diffusion of O2 in active muscle cells. Calculate YO2 at 8.6 torr Calculate YO2 at 2 torr Write a brief statement answering the question of how Mb helps O2 diffuse through the muscle cells