Which ion is reabsorbed in PCT and actively secreted into filtrate by DCT?

Na+

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H C O_{3}^{-}

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K+

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H+

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Solution

The correct option is C K+
Potassium is freely filtered at the glomerulus and passes through to the PCT and loop of Henle, where most of it is reabsorbed. There is some reabsorption in the DCT and collecting
duct, but potassium secretion also occurs at DCT.

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Similar questions

Regarding the assertion and reason, choose the correct option.

Assertion [A]: The filtrate that moves from the PCT to the loop of Henle, remains isosmotic.

Reason [R]: About 50% of urea is reabsorbed.

Filtration of the blood takes place at
(a) PCT (b) DCT
(c) Collecting ducts (d) Malpighian body.

m 0 s m l^{- 1}

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