Which of the following is true for the Na+K+ -ATPase pump? (I) It pumps 3 Na+ in and 2 K+ out of the cell (II) It uses the energy derived directly from the breakdown of adenosine t... Which of the following is true for the Na+K+ -ATPase pump? (I) It pumps 3 Na+ in and 2 K+ out of the cell (II) It uses the energy derived directly from the breakdown of adenosine triphosphate (ATP) (III) Without this pump, most cells of the body would swell until they burst (IV) It uses an ion concentration gradient across a membrane as the energy source (V) If the pump is blocked Na+ concentration inside the cell will increase
Understand the Problem
The question is asking to evaluate various statements regarding the Na+K+ -ATPase pump and determine which of them are true. This involves understanding the function, mechanism, and consequences of the pump's operation in cellular physiology.
Answer
II, III, and V are true.
II, III, and V are true.
Answer for screen readers
II, III, and V are true.
More Information
The Na+/K+-ATPase is crucial for maintaining cellular homeostasis by using ATP to pump ions against their concentration gradients. Failure of this pump can lead to cellular swelling and potential rupture due to ion imbalances.
Tips
A common mistake is confusing the direction of ion movement; the pump moves sodium out of the cell and potassium into the cell.
Sources
- Physiology, Sodium Potassium Pump - StatPearls - NCBI Bookshelf - ncbi.nlm.nih.gov
- Sodium–potassium pump - Wikipedia - en.wikipedia.org
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