MEDICAL
KIDNEY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Glucose is reabsorbed into the capillaries surrounding the first convulated tubule. The cells lining the inside of the tubule at this point have:
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protein pumps and many mitochondria for active transport
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extra thick cell membranes to prevent damage from urea
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microvilli to increase the surface area:volume ration
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have sieve plates to help filter out unwanted materials
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Explanation:
Detailed explanation-1: -Active transport is the key to the reabsorptive processes in the proximal tubule. Glucose and amino acids are reabsorbed across the apical membrane of the proximal tubule by sodium-coupled secondary active transport.
Detailed explanation-2: -Most of the glucose entering the tubular system is reabsorbed along the nephron segments, primarily in the proximal tubule, such that urine is almost free of glucose.
Detailed explanation-3: -The proximal tubule normally reabsorbs 100% of filtered glucose, amino acids, and small peptides.
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