Glucose reabsorption in the proximal tubule
In a healthy person, nearly all filtered glucose is reabsorbed in the:
Answer D: explanation for every choice
A
The loop of Henle concentrates urine through the countercurrent mechanism.
B
The distal tubule fine-tunes electrolytes, including Na⁺ and Ca²⁺.
C
The collecting duct adjusts water reabsorption under ADH control.
D
Correct. The proximal tubule reabsorbs glucose, amino acids, and most of the filtered Na⁺ and water.
TakeawayProximal tubule: glucose and amino acids. Above the transport maximum, glucose spills into urine.
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Reviewed 2026-11-05 by a medical student. Spot an error? Report it with question ID bb97.