All of the following are endogenous clearance test substances except: A) Urea B) Creatinine C) Inulin D) Beta₂ microglobulin

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Inulin is an exogenous substance used in clearance tests to measure glomerular filtration rate (GFR) because it is freely filtered at the glomerulus and neither secreted nor reabsorbed by the kidney. Urea, Creatinine, and Beta-2 Microglobulin are endogenous substances naturally produced by the body and used to assess kidney function.

All of the Following Are Endogenous Clearance Test Substances Except