Na⁺/K⁺-ATPase stoichiometry
For each ATP hydrolyzed, the Na⁺/K⁺-ATPase moves:
Answer A: explanation for every choice
A
Correct. The pump moves 3 Na⁺ out and 2 K⁺ in. It is electrogenic, adding to the negative resting potential.
B
This reverses the numbers.
C
This reverses the directions.
D
The pump moves unequal numbers of ions.
TakeawayThree Na⁺ out, two K⁺ in.
Next question →
Reviewed 2026-11-05 by a medical student. Spot an error? Report it with question ID bb73.