Question

Which of the following terms is defined as the concentration at which a substance in the blood, not normally excreted by the kidney, begins to appear in the urine?

A) Supernatant.
B) Refractive index.
C) Renal threshold.
D) Micturition.
E) Aliquot.

Answer 1

The term defined as the concentration at which a substance in the blood, not normally excreted by the kidney, begins to appear in the urine is Renal threshold.

Step-by-step explanation:

The term defined as the concentration at which a substance in the blood, not normally excreted by the kidney, begins to appear in the urine is Renal threshold. The Renal threshold is the maximum concentration of a substance that the renal tubules can reabsorb and transport back into the blood. Once the plasma concentration of a substance exceeds the renal threshold, it is excreted in the urine.