The plasma clearance of a substance can be used to calculate the glomerular filtration rate (GFR) if that substance is freely filtered at the glomerulus and
A)secreted and reabsorbed by the tubules
B)neither reabsorbed nor secreted by the tubules
C)secreted by the tubules
D)reabsorbed by the tubules
E)None of the above correctly completes the sentence.

Question

Quizplus · Accepted Answer

If a substance is freely filtered at the glomerulus and is neither reabsorbed nor secreted by the tubules, then the plasma clearance of that substance can be used to calculate the GFR. This is because the substance is only eliminated from the body through filtration at the glomerulus and not through any other mechanisms. Examples of such substances include inulin and creatinine.

The Plasma Clearance of a Substance Can Be Used to Calculate