If the renal plasma clearance of a substance is equal to the glomerular filtration rate, it means that the substance is
A) filtered and undergoes net secretion
B) filtered and undergoes net reabsorption
C) filtered but neither secreted nor reabsorbed
D) filtered, secreted, and reabsorbed
E) not filtered

Question

Quizplus · Accepted Answer

If the renal plasma clearance of a substance is equal to the glomerular filtration rate, it means that the substance is undergoing filtration but is neither secreted nor reabsorbed. This indicates that the substance is freely filtered across the glomerular membrane but is not actively transported across the tubules, indicating that it is not being reabsorbed or secreted. Thus, the substance is only undergoing filtration and is not being further handled by the kidneys.

If the Renal Plasma Clearance of a Substance Is Equal