science
Grade-10
Easy
Question
Sodium-potassium pump requires ATP to function properly because_______.
- The concentration of sodium and potassium ions is nil inside the cell.
- The concentration of sodium ions is more outside the cell and the concentration of potassium ions is more inside the cell.
- The concentration of potassium ions is more inside the cell and the concentration of sodium ions is more outside the cell.
- The concentration of sodium and potassium ions is more outside the cell.
Hint:
As sodium ion concentration is higher outside the cell and potassium ion concentration is more inside the cell, the sodium-potassium pump requires ATP to derive energy for the active ion pump.
The correct answer is: The concentration of sodium ions is more outside the cell and the concentration of potassium ions is more inside the cell.
- The sodium ion concentration is more outside the cell and the potassium ion concentration is more inside the cell.
- To balance the sodium and potassium ion concentrations in and out of cells sodium-potassium pumps actively exchange the ions.
- This is an active ion exchange process, thus requiring energy from ATP breakdown.
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