phosphate groups
phosphate groups
phosphate groups
Phosphate groups
Phosphate groups
Phosphate groups
Phosphate groups
The cell membrane is the layer that surrounds the cell and allows nutrients and water to pass through.
phosphate groups
Phosphate groups
Water crosses the permeable membrane of an animal cell through a process called osmosis. Osmosis is the movement of water from an area of high concentration to an area of low concentration, across a selectively permeable membrane. This process helps maintain the balance of water inside and outside the cell.
A plant cell membrane lines the inside of the cell wall. The membrane allows only certain molecules into the cell depending on the size. It acts as a filter, and allows food and water to enter the cell, and gets rid of wastes and un-necessary nutrients.
In a plant cell a vacuole stores water. The membrane allows the passage of water into and out of the cell. The vacuole gets smaller if there is not enough water in the environment because its water is being used in the cell to keep the cell functioning normally.