When the glomerular transport maximum for a substance such as blood glucose is exceeded and its renal threshold has been reached, the substance will:
A) Reabsorb quickly
B) Spill into the urine
C) Countertransport sodium
D) Attach to protein carriers
Ans: B
Feedback:
When the substance (such as blood glucose) exceeds the number of carrier proteins available for transport, the transport maximum has been exceeded, the renal threshold is reached, and the substance will spill (not reabsorb) into the urine. Sodium cotransport helps to move the substance back into the tubule.
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