So let's take a look at what happens. We have freely filtered. So that means out of the 625 ML/minute that comes in, 125 ML/minute is basically filtered through our membrane into the tubular section of the nephron. Now, when the filtered is traveling through our nephron, it is fully secreted. That substance that ends up in the peritubular capillaries is fully secreted into our filtrate found traveling along our tubular section of that nephron. So what does that tell us about our renal clearance?