Oxygen diffusion rates within cells may be heterogeneous, with more rapid diffusion
occurring along intracellular pathways of high oxygen solubility, such as mitochondria.
Recent experimental data indicate that tissue oxygen permeability rises sharply in a
temperature range associated with phase transitions in lipid membranes suggesting that
membranes may function as oxygen “pathway”. The experimental data have been analyzed
using theoretical models of diffusion in two-phase media. By assuming muscles to be …