It's not about adding volume like sodium or glycerol. It's regulating contractual electrical integrity and functional capacity of cell membranes.
How the two different ions– sodium and potassium work in tandem. Sodium causes depolarization (activation) via influx (inward movement) of the cell. Contrastingly, potassium causes repolarization (reset) via effluxing (outward movement) of the cell to restore the negative charge, allowing the cell to fire again.
This will give a bit of insight on how potassium directly flips the switch off towards repolarization-> action potential-> contractual movement.
Potassium is an essential mineral and electrolyte that plays a critical role in muscle function, particularly in the contraction and relaxation of muscle fibers. It helps maintain the electrical charge across cell membranes, which is crucial for generating action potentials that lead to muscle...
fiveable.me