The sodium equilibrium potential using an extracellular Na⁺ concentration of 145 mEq/L and an intracellular concentration of 14 mEq/L would be about A)-90mV. B)+62mV. C)-62mV. D)+90mV.

Question

Quizplus · Accepted Answer

The sodium equilibrium potential can be calculated using the Nernst equation. For sodium ions at body temperature, the equation simplifies to E(Na+) = 61 log([Na+]out/[Na+]in). Plugging in the given concentrations, E(Na+) = 61 log(145/14) ≈ +62 mV.

The Sodium Equilibrium Potential Using an Extracellular Na+ Concentration of 145

The Sodium Equilibrium Potential Using an Extracellular Na⁺ Concentration of 145