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. We basically get the following diagram. So this is the microvilli membrane of, let's say, this cell right here. So, if we examine the membrane, we'll see these transport proteins that we spoke of earlier.