The outward flow of ions out of the cells is called
Influx
Efflux
Osmosis
Flocs
Flux refers to the movement of substances within cells and organisms. Influx is the inward movement into cells, while efflux is the outward movement out of cells. Efflux specifically refers to the active transport of ions out of the cell membrane, which is important for maintaining ion balance and cell homeostasis. Therefore, the correct answer is option b.