All the following statements concerning the Na⁺-K⁺ pump are correct EXCEPT which one? A)The phosphorylated conformation of the Na⁺-K⁺ pump has high affinity for K⁺ when exposed to the ICF. B)The Na⁺-K⁺ pump has ATPase activity. C) The Na⁺-K⁺ pump establishes Na⁺ and K⁺ concentration gradients across the plasma membrane; these gradients are critically important in the ability of nerve and muscle cells to generate electrical impulses essential to their functioning. D) The Na⁺-K⁺ pump helps regulate cell volume by controlling the concentration of solutes inside the cell to minimize osmotic effects that would induce swelling or shrinking of the cell.

Question

Quizplus · Accepted Answer

The phosphorylated conformation of the Na⁺-K⁺ pump actually has low affinity for K⁺ when exposed to the ICF, not high affinity. This is because the pump undergoes a conformational change upon phosphorylation, which results in a decrease in the affinity for the ions it transports. The other statements are all correct.

All the Following Statements Concerning the Na+-K+ Pump Are Correct

All the Following Statements Concerning the Na⁺-K⁺ Pump Are Correct