Which statement regarding the renal threshold is correct?
A) It is the maximum amount of a particular substance that can be excreted in the urine per unit of time.
B) It is the maximum amount of a particular substance that the tubular cells are capable of actively reabsorbing per unit of time.
C) It is the plasma concentration of a particular substance at which its Tm is reached and the substance first appears in the urine.
D) It is the maximum amount of waste product that can be concentrated in the urine per unit of time.

Question

Quizplus · Accepted Answer

The renal threshold is the plasma concentration of a particular substance at which its Tm (transport maximum) is reached, and the substance first appears in the urine. This threshold is different for each substance and can be affected by factors such as age, gender, and health status. The other answer choices do not accurately describe the renal threshold.

Which Statement Regarding the Renal Threshold Is Correct