Which of these statements describes tubular maximum (Tm)
A)It is the rate of glomerular filtration.
B)It is the rate at which a substance can be reabsorbed because of saturation of the carrier molecule.
C)It is the rate at which a substance can be cleared from the blood.
D)It is the percentage of renal blood flow that can be converted to filtrate.

Question

Quizplus · Accepted Answer

Tubular maximum (Tm) refers to the maximum rate at which a substance can be reabsorbed through the renal tubules before the carrier molecules involved in reabsorption are saturated. Once the carrier molecules are saturated, any excess of the substance will be excreted in the urine, regardless of whether plasma concentration is high or low. Therefore, Tm reflects the capacity of the renal tubules to reabsorb a substance.

Which of These Statements Describes Tubular Maximum (Tm)