`Na^+ and K^+` out of the neuron `Na^+ and K^+` into the neuron `Na^+` into the neuron and `K^+` out of the neuron `K^+` into the neuron and `Na^+` out of the neuron
Solution :Each `Na^+ - K^+` pump expels three `Na^+` IONS for every two `K^+` ions IMPORTED.