Answer to Question #193992 in Human Anatomy and Physiology for Mohammed

Question

Please see the attached question: https://ibb.co/mz6427b

Why is the answer "G"?

Answer 1

At the point when solute fixation is high to such an extent that all transporter proteins and siphons are involved, the maximum transport of that solute is considered to be reached. At the point when the plasma concentration of the solute ascends to the point that the concentration of the filtrate surpasses the maximum transport, a portion of the solute begins to show up in the urine as "overflow" and now the renal threshold is reached.

When glucose concentration in the blood plasma is reached the normal value i.e. 80-100 mg/dL, the excess glucose is excreted via urine by the kidney. It is called the renal threshold for glucose. 

Here, urinary excretion of glucose=100mg/min

According to the graph, 100 mg/min Glucose is excreted when the plasma glucose concentration is 600 mg/dL.

So renal threshold for glucose= 600 mg/dL

GFR= 100 mL/min=1 dL/min

The transport maximum (T_m) for glucose reabsorption= GFR x renal threshold for glucose

                                            =1 x 600 mg/min = 600 mg/min



Hence, correct option is H. 600 mg/min