How does a cell membrane affect water movement?

This indicates that it is selectively permeable, which is defined as allowing certain types of molecules to pass through (across) it in both directions. Hence, if the membrane is selective, it means that only specific types of molecules enter the cell and exit the cell; for example, sodium can enter the cell through this plasma (or cell) membrane. Water typically passes through the cell membrane by a process known as passive transport, which is the same as diffusion.

Water only moves across the membrane when there is less water on the side it moves to; it does not move from one side of the membrane to the other. This requires energy, or ATP. It also depends on the concentration of ions, such as sodium (Na+). If you have any questions, please let me know.

Osmosis, in which water travels across the membrane from regions of low solute concentration to regions of high solute concentration, and aquaporins, which are specialized channels in the membrane that help move water molecules, are two processes that the cell membrane influences.