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Which of the following is true of the sodium-potassium exchange pump?
A. It is an example of active transport.
B. It maintains sodium at equal intracellular and extracellular levels.
C. It is only found in muscle cells.
D. It causes the output of cellular energy in the form of ATP.
E. It moves sodium into the cell and potassium out of the cell.
What is It is an example of active transport