dc potential

The term "DC potential" in biology refers to relatively steady or slowly varying electrical potentials within living organisms, distinct from the rapid electrical signals seen in nerve impulses. These DC potentials can be observed in various biological contexts, such as areas of damaged tissue where potassium ions leak out, differences between brain regions, or within specific glands and structures like the inner ear.1

These bioelectric potentials are generated at the cellular level, dependent on the cell membrane, which acts like a capacitor storing energy through ion distribution. While nerve and muscle cells utilize rapid changes in potential (action potentials) for signaling and contraction, other cells maintain these more stable DC potentials for metabolic control or specialized functions. The magnitude of these potentials typically ranges from millivolts to tens of millivolts.12