cell membrane
cell membrane
its the cell wall
Cell wall
The plasma membrane surrounds all cells and is selectively permeable to control what enters and leaves the cell. It regulates the passage of ions, nutrients, and waste products, maintaining a stable internal environment.
The nucleolus .
Cell wall
The nucleolus .
Regulates what enters and leaves the cell
cell membrane
The cell membrane is the structure that surrounds a cell and controls what enters and leaves the cell. It is made up of a lipid bilayer with embedded proteins that selectively allow certain molecules and ions to pass through the membrane.
The nuclear envelope is the structure that surrounds the DNA and controls what enters and leaves the nucleus. It consists of two membranes, an inner and outer membrane, that are studded with nuclear pores which regulate the passage of molecules.
the cell membrane which is semi-permeable