Choose the incorrect statements.
A. All ions move across the cell membrane only by active transport.
B. All ions move across the cell membrane only by facilitated diffusion.
C. Water is a polar molecule that can move passively through the cell membrane.
D. Plasma membrane is selectively permeable membrane and it allows movement of some substances across it by active transport and some others by passive transport.
Some ions move actively by active transport through carriers by using energy and some others move passively by facilitated diffusion. The ions that move actively into the cell may move out passively.