Now, notice that as all these ions, as these ions and this ion basically moves into the cytoplasm of our epithelial cell, that increases the concentration of solute inside our cell and that also increases our osmotic pressure. And that will basically allow the passive transport of our water across the membrane from the lumen side to our cytoplasm. Why does the water move this way? Well, because it moves into an area where we have a high concentration of solute. And that concentration solute was basically built due to the movement of these ions into our cell. So we see that potassium, sodium, water, glucose and amino acids are all reabsorbed by our cell.