Which statement about the glucose–Na+ symporter is true?

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Multiple Choice

Which statement about the glucose–Na+ symporter is true?

The glucose–Na+ symporter operates by secondary active transport: it uses the energy stored in the sodium electrochemical gradient to move glucose into the cell against its own gradient. That gradient is created and maintained by the Na+/K+ ATPase, which uses ATP to pump Na+ out of the cell. Because the symporter relies on this Na+ gradient, it works in tandem with the Na+/K+ pump to achieve glucose uptake. It does not use ATP directly to move glucose, and it cannot function without the Na+ gradient, so statements claiming independence from or lack of reliance on Na+ gradients are incorrect.

The glucose–Na+ symporter operates by secondary active transport: it uses the energy stored in the sodium electrochemical gradient to move glucose into the cell against its own gradient. That gradient is created and maintained by the Na+/K+ ATPase, which uses ATP to pump Na+ out of the cell. Because the symporter relies on this Na+ gradient, it works in tandem with the Na+/K+ pump to achieve glucose uptake. It does not use ATP directly to move glucose, and it cannot function without the Na+ gradient, so statements claiming independence from or lack of reliance on Na+ gradients are incorrect.

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