Question

The Nernst equation predicts

A) the membrane potential resulting from all permeable ions.
B) the membrane potential resulting from permeability to a single ion.
C) intracellular ion concentrations
D) extracellular ion concentrations
E) the threshold membrane potential.

Answer 1

The Nernst equation predicts the membrane potential resulting from permeability to a single ion and allows us to calculate the equilibrium potential for a single ion.

Step-by-step explanation:

The Nernst equation predicts the membrane potential resulting from permeability to a single ion.

The Nernst equation is expressed as:

E = (RT/zF) * ln([ion]out/[ion]in)

Where E is the membrane potential, R is the gas constant, T is the temperature, z is the charge of the ion, F is Faraday's constant, and [ion]out and [ion]in are the concentrations of the ion outside and inside the cell respectively.

This equation allows us to calculate the equilibrium potential for a single ion based on its concentration gradient, temperature, and charge.