In the distal convoluted tubule $(DCT)$ of the nephrons:

  • A
    Sodium reabsorption requires energy
  • B
    Secretion of potassium ions does not require energy
  • C
    Water reabsorption requires energy
  • D
    Water reabsorption does not require energy

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$I.$ Glucose $II.$ Amino acid $III.$ $Na^+$ $IV.$ Nitrogenous waste
Which of these are reabsorbed actively in the nephron?
Choose the correct option.

Reabsorption in the tubules of nephrons occurs by the process of

The ascending limb of the $Loop$ of $Henle$ is ........

The brush border is a characteristic of which of the following?

$A :$ Tubular secretion is of considerable importance in marine teleost fishes.
$R :$ These have aglomerular kidney,$i.e.$,no filtration occurs and tubular secretion is the only way of excretion.

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