<prompt> All of the following transpo processes follow saturation kinetics exceptFacilitated diffusionNa - Ca2 exchangerSimple diffusionNa coupled active transpo  <response>: Diffusion primarily depends on the concentration of molecules. Passage of ions or molecule from a region of higher concentration to a lower concentration without the expenditure of energy is called diffusion. REF TEXTBOOK OF MEDICAL PHYSIOLOGY GEETHA N 2 EDITION, PAGE NO - 4 