The Transport Maximum is the Upper Limit to the Amount

Question

The transport maximum is the upper limit to the amount of a substance that can be
A)dissolved in the plasma before it will filter across the glomerulus.
B)reabsorbed back into the bloodstream.
C)eliminated in the urine per hour.
D)withdrawn from the blood per hour.
E)cycled through the kidney per day.

Accepted Answer

The transport maximum refers to the maximum rate at which a substance can be reabsorbed (or secreted) by the renal tubules back into the bloodstream. Once this limit is reached, any excess of the substance will be excreted in the urine. This concept is particularly important for substances like glucose, where the transport maximum ensures that under normal conditions, glucose is completely reabsorbed and not lost in the urine.