The equilibrium potential of an ion is the potential at which
A) There is the same concentration of the ion on both sides of the membrane
B) The electrical force on the ion is zero
C) $\Delta$$\mu$ for passive ion transport across the membrane is zero
D) The conductance for an ion is zero
E) $\Delta$$\mu$ for ion transport is exactly matched by the$\Delta$$\mu$ for ATP hydrolysis

Question

The equilibrium potential of an ion is the potential at which
A) There is the same concentration of the ion on both sides of the membrane
B) The electrical force on the ion is zero
C) $\Delta$$\mu$ for passive ion transport across the membrane is zero
D) The conductance for an ion is zero
E) $\Delta$$\mu$ for ion transport is exactly matched by the$\Delta$$\mu$  for ATP hydrolysis

Quizplus · Accepted Answer

The equilibrium potential of an ion is defined as the membrane potential at which the net flow of the ion across the membrane is zero, meaning the chemical and electrical forces are balanced, resulting in a $\Delta\mu$ for passive ion transport across the membrane being zero.

The Equilibrium Potential of an Ion Is the Potential at Which