The clearance ratio indicates whether a given substance is filtered, reabsorbed, or secreted in the kidneys. It can be calculated by dividing the clearance value of substance x by the glomerular filtration rate (GFR). Clearance ratio = ₓ÷.
If the ratio is 1.0, then the clearance of x is equal to GFR, meaning that x is filtered, but neither reabsorbed or secreted. If the ratio is less than 1.0, then x is EITHER filtered and then reabsorbed, OR it is not filtered. If the ratio is greater than 1.0, then x is filtered and also secreted.
Calculate the clearance ratio for ⁺, assuming a GFR of 125m/m. Plug the values into the equation for clearance ratio given above. Round your final answer to four decimal places.