Which of these statements describes the renal threshold
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 defined as the plasma concentration of a particular substance at which its Tm (transport maximum) is reached and the substance first appears in the urine. It represents the maximum level of a substance that can be filtered and reabsorbed by the kidneys before being excreted in the urine. Option A describes the maximum amount that can be excreted, while Option B describes the maximum amount that can be actively reabsorbed. Option D describes the maximum amount of waste product that can be concentrated in the urine, but it is not specifically related to the renal threshold.

Which of These Statements Describes the Renal Threshold