Which is NOT Part of the Reason Why the Clearance

Question

Which is NOT part of the reason why the clearance of inulin is equal to the GFR?
A) Inulin is freely filtered
B) Inulin is not reabsorbed
C) Inulin is not secreted
D) Inulin is not metabolized
E) Inulin crosses cell membranes

Accepted Answer

Inulin's clearance is equal to the GFR because it is freely filtered, not reabsorbed, not secreted, and not metabolized, ensuring it accurately reflects the filtration rate. The fact that inulin crosses cell membranes is not relevant to its role in measuring GFR, making it the incorrect statement in the context of why inulin clearance equals GFR.