If the Tm for a particular amino acid is 120 mg/100 ml and the concentration of that amino acid in the blood is 230 mg/100 ml,the amino acid will .
A)be reabsorbed by secondary active transport
B)appear in the urine
C)be completely reabsorbed by the tubule cells
D)be actively secreted into the filtrate

Question

Quizplus · Accepted Answer

The Tm (transport maximum) is the maximum concentration of a substance that can be reabsorbed by the kidneys. If the concentration of a substance in the blood exceeds its Tm, the excess will not be reabsorbed and will instead be excreted in the urine. Therefore, if the concentration of a particular amino acid in the blood exceeds its Tm, it will appear in the urine.

If the Tm for a Particular Amino Acid Is 120