PATHOLOGY MCQ
URINARY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Materials involved in DCT reabsorption. SELECT ALL THAT APPLY
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Na+
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H+
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H2O
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HCO3-
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Explanation:
Detailed explanation-1: -It was concluded that HCO3-reabsorption in the proximal tubule was mediated by H+ secretion, but that carbonic anhydrase located in the luminal membrane of the cell prevented H2CO3 from accumulating in the tubular fluid.
Detailed explanation-2: -Calcium. Approximately 7%–10% of filtered calcium is reabsorbed in the DCT. In contrast to other segments of the nephron, which passively reabsorb calcium through paracellular routes, 100% of the calcium that is reabsorbed in the DCT occurs by active transcellular mechanisms.
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