According to the stoichiometry of the sodium-potassium pump, how many ions of each type are moved per ATP molecule used?
Answer
Three sodium ions ($ ext{Na}^+$) out of the cell and two potassium ions ($ ext{K}^+$) into the cell.
The sodium-potassium pump uses one ATP to actively pump three $ ext{Na}^+$ ions out and two $ ext{K}^+$ ions into the cell, establishing both concentration and electrical gradients.
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