And this allows the movement of calcium from within the cell to our interstitium. And what this does is it allows our distal convoluted tubular to reabsorb our calcium into the surrounding tissue and eventually into the peritubular cavities, our blood system. Now, you should note that a type of hormone known as the parathyroid hormone stimulates the reabsorption of calcium within our distal convoluted tubule. Now, let's move on to another type, or actually two sets of important channels known as the sodium potassium protein channels and sodium hydrogen channels. So these two protein transporters are basically stimulated by a hormone known as aldosterone. So aldosterone can activate these channels.