"Gatekeeper" Separates the cell from the rest of the environment and helps control what passes in and out of the cell. Semi-permeable: allows some materials to pass through but not all
Gatekeeper separates the cell from the rest of the environment and helps control what passes in and out of the cell.
By acting as a gatekeeper, the plasma membrane protects the cell from its surroundings and keeps important molecules from leaving the cell, so that the correct balance of molecules is maintained.
