Linked from
The 14 pages that link to Resting membrane potential, each with the reason it gives.
Action potentialRelated: Its departure from this baseline begins the voltage change.
NeuroscienceRelated: It establishes the electrical conditions that let neurons generate signals.
Potassium ionRelated: Unequal K⁺ concentrations across the membrane help establish this voltage.
Nerve conductionRelated: Its ion gradients provide the starting conditions for an action potential.
Extracellular fluidRelated: Its value depends partly on ion concentrations in extracellular fluid.