Multiple choice

Which of the following statements concerning potassium ions in the cells is false?

  1. Potassium is the major extracellular ion.

  2. Within cells, the concentration of potassium is higher than that of sodium.

  3. Potassium excretion is regulated by altering potassium secretion.

  4. The 3Na+/2K+ ATPase pumps potassium out of cells.

  5. Selected cells have potassium channels.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The 3Na+/2K+ ATPase pumps sodium out of cells and potassium into cells to maintain this situation.

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