The two rates are exactly the same. And so the shape and size of the cell will remain the same. And this type of transport, once again, is known as passive diffusion. So we are not using energy, we are not using any type of integral protein and our molecules are moving down our electrochemical gradient. Now, let's move on to a different type of cell membrane transport known as facilitated diffusion or passive transport. So certain molecules, such as sugar molecules, are too large and simply too polar to actually pass across our cell membrane via the process of passive diffusion.