It refers to the difference in charged ions across a cell’s plasma membrane due to the difference in ion concentrations.Group of answer choicesmembrane potentialosmotic potentialconcentration gradientelectrochemical gradient

It refers to the diffusion gradient of an ion, which is affected by both the concentration difference of an ion across a membrane (a chemical force) and the ion’s tendency to move relative to the membrane potential (an electrical force).Group of answer choicesosmotic potentialconcentration gradientelectrochemical gradientmembrane potential

The voltage across a membrane is called the _____.Group of answer choicesmembrane potentialosmotic potentialchemical gradientelectrochemical gradient