Glucose is usually reabsorbed from the filtrate in the kidney back into the blood through carrier proteins; hence, glucose in the urine is considered abnormal. What of these conditions can result in glucose in the urine?
A)low levels of glucose in the blood
B)transport maximum for renal glucose reached or competitors for glucose carriers
C) low consumption of glucose
D) increased availability of glucose carriers

Question

Quizplus · Accepted Answer

Glucose in the urine may indicate that the transport maximum for renal glucose has been reached, meaning that the carrier proteins in the kidney are overwhelmed and glucose cannot be reabsorbed back into the blood. This can also occur if there are competitors for the glucose carriers. Low levels of glucose in the blood (choice A) or low consumption of glucose (choice C) would not result in glucose being present in the urine. Increased availability of glucose carriers (choice D) would actually increase the efficiency of glucose reabsorption and would not result in glucose in the urine.

Glucose Is Usually Reabsorbed from the Filtrate in the Kidney