The rate of diffusion of gases through the respiratory membrane increases with an increase inA.     Surface areaB.     Solubility of gasesC.     Partial pressure differenceD.     Membrane thicknessE.     Molecular weight of the gases

The rate of diffusion of gases through the respiratory membrane increases with an increase in surface area, solubility of gases and partial pressure difference. It decreases with an increase in diffusion distance and the molecular weight of the gases.