Creatinine clearance is a good approximation to the GFR because creatinine
A) Is made in the body
B) Is freely filtered and not reabsorbed and secreted only a little
C) Is avidly secreted
D) Concentration in plasma is relatively constant
E) Concentration in plasma is inversely related to the GFR

Question

Quizplus · Accepted Answer

Creatinine is freely filtered by the glomerulus and is not reabsorbed, with only a small amount being secreted, making it a good approximation of the glomerular filtration rate (GFR).

Creatinine Clearance Is a Good Approximation to the GFR Because