AP Biology· difficulty 3/5
The Na⁺/K⁺ pump moves
3 Na⁺ out and 2 K⁺ in per ATP
Only sodium
Equal numbers of each
3 K⁺ in and 2 Na⁺ out per ATP
Explanation
Standard stoichiometry: 3 Na⁺ exported, 2 K⁺ imported per ATP hydrolyzed. Maintains the resting membrane potential.
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