And let's discuss which molecules and ions are reabsorbed and which ones are secreted. Now, the proximal convoluted tubule of that nephron basically is responsible for absorbing about 70% of all the sodium and water that is found within our filtrate. And it also basically absorbs 100% of our amino acids and glucose molecules that end up in our filtrate when the blood plasma travels from our glomerulus to our Bowman's capsule. So the proximal convolute tubel is responsible for absorbing nearly 70% of the sodium and water found in the filtrate back into our blood system via these peritubular cavities. It also absorbs in normal cells 100% of the glucose and amino acids in our glomerul filtrate. So let's zoom in on any one of these cells.