Multiple choice

Which of the following statements is correct?

  1. Concentration of sodium is higher inside the cell than outside.

  2. Concentration of calcium is higher inside the cell than outside.

  3. Concentration of potassium is higher inside the cell than outside.

  4. Concentration of magnesium is higher inside the cell than outside.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In animal cells, potassium concentration is significantly higher inside the cell (~140 mM) compared to outside (~4 mM). This gradient is maintained by the Na+/K+ ATPase pump and is essential for resting membrane potential and cellular function.

Keep practicing — related questions