Which of the Following Statements Concerning the Na⁺-K⁺ Pump Is

question 129

Multiple Choice

Which of the following statements concerning the Na⁺-K⁺ pump is incorrect?

• 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.
• E) the ion concentration gradient established by the Na⁺-K⁺ pump drives cotransport carriers to move glucose against its concentration gradient across intestinal and kidney cells.

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