Question

does the cell membrane always allow the flow of water (solvent)

Answer 1

Yes, the cell membrane allows the flow of water (solvent) through a process known as osmosis. Osmosis is the movement of solvent molecules from an area of lower solute concentration to an area of higher solute concentration through a selectively permeable membrane, such as the cell membrane. The cell membrane is selectively permeable, meaning it allows the passage of water molecules while restricting the passage of most solute molecules.