What is the role of the sodium-potassium pump in cellular transport?
A. To facilitate the diffusion of sodium and potassium ions across the cell membrane
B. To produce ATP
C. To maintain the cell’s volume
D. To actively transport sodium and potassium ions across the cell membrane, maintaining a high concentration of potassium ions inside the cell and a high concentration of sodium ions outside the cell
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Which of the following processes requires energy input to move molecules against their concentration gradient?
A. Diffusion
B. Osmosis
C. Active transport
D. Passive transport
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