Potencial Nernst K⁺

The Potassium Nernst Potential calculator computes the electric potential generated by potassium ion (K⁺) concentration differences between a cell's interior and exterior. It uses the Nernst equation: E = (RT/zF)·ln([K]out/[K]in), where R is the gas constant, T is temperature, z is ion valence, F is Faraday's constant, and [K]out/[K]in are extracellular/intracellular concentrations. Results are in volts or millivolts, depending on temperature and concentration units.

This formula is critical in biophysics for understanding ionic equilibrium in cell membranes, especially in neurons and muscles. For example, it calculates resting membrane potentials in nerve cells, where K⁺ tends to exit the cell, creating an internal negative potential. The calculation accounts for temperature (in Kelvin) and concentration ratios, which vary by tissue and physiological state.

Note that the calculator assumes ideal conditions, such as membrane selectivity for K⁺ alone and negligible contributions from other ions. In real scenarios, factors like ambient temperature, concentration fluctuations, and presence of other ions (Na⁺ or Cl⁻) may affect results. Users should cross-check input data with experimental values or reliable references for higher accuracy.