As a consequence of the activity of the sodium-potassium transporters,
a. extracellular sodium concentrations are kept low.
b. intracellular sodium concentrations are kept very high.
c. extracellular potassium concentrations are kept very high.
d. intracellular sodium concentrations are kept low.
e. very little energy is required to maintain ionic differences across the membrane.
Answer: d. intracellular sodium concentrations are kept low.
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