Q:

Potassium

safaTerkawi
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2022-08-11
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 Potassium.

  1. Is actively secreted in the distal convoluted tubule.
  2. Is reabsorbed in the proximal convoluted tubule.
  3. Deficiency favours hydrogen ion secretion in the distal tubule.
  4. Excretion is determined largely by potassium intake.
  5. Blood levels tend to rise in patients with acute renal failure taking a normal diet.
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safaTerkawi
2022-08-11
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A. True In exchange for sodium ions.

B. True It is reabsorbed passively down the gradient created by Na+ and H2O reabsorption.

C. True Potassium and hydrogen compete for secretion in exchange for sodium.

D. True Thus potassium balance is maintained.

E. True In acute renal failure, the failure to excrete the potassium intake leads to high blood levels which can compromise the performance of the heart.

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