Impermeable Membrane | Overview, Definition & Examples

Cell Membrane (Plasma Membrane)

Function, Structure, and Composition of the Cell Membrane

Semipermeable Membrane - American Chemical Society

What can pass through a semipermeable membrane? - TimesMojo

Cell Membrane Overview, Functions & Importance

The cellular membrane, also known as the plasma membrane, is present in all cells and separates the cell’s internal environment from the outside surroundings. It is mainly composed of a lipid bilayer, which provides both flexibility and structural support. This membrane is semipermeable, meaning it selectively permits certain substances to enter or leave the cell while preventing others from passing through. By controlling the movement of materials, the plasma membrane helps maintain internal ba