NROS 307 Lecture Notes - Lecture 7: Reversal Potential, Nernst Equation, Membrane Potential
10 Sep 2016
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Lecture 6,7, and 8 - resting membrane potential. As one can see from the figure above, the membrane electric potential is zero. As one can see from the figure above, the membrane electrical potential = 59 mv. The cytosolic face (left) is positive with respect to the exoplasmic face. When the electrical interaction is strong enough, it will stop the diffusion of na+ that is controlled by the concentration gradient. As one can see from the figure above, the membrane electrical potential = -59mv. The cytosolic face (left) is negative with respect to the exoplasmic face. The nernst potential is a measure (voltage) of the membrane potential where the strength of the electrical gradient and the concentration gradient are equal and opposite for a particular molecule assuming that the molecule can cross the membrane. V = equilibrium potential in volts (internal potential minus the external potential) Co and ci = outside and inside concentration of the ions.
