The movement of charged particles (calcium, sodium, potassium) in and out of cells, essential for cell signaling, energy production, and healing. Ions pass through selective channels in the cell membrane, driven by concentration gradients and electrical potential. By inducing a small electric field in tissue (Faraday's law), PEMF may influence the electrical potential across cell membranes, one of the proposed ways it interacts with cells.
A living cell holds a small voltage across its membrane, more positive on one side than the other. Channels in the membrane let charged ions cross, which shifts that voltage. This is the electrical side of a cell that a changing magnetic field can interact with. It is background biology, not a claim about any specific outcome.
