Cell membrane

Definition

The cell membrane is a thin, flexible barrier that surrounds the cell, controlling what enters and leaves to maintain an internal balance. It is composed of a bilayer of lipids with embedded proteins.

Related terms

Phospholipid Bilayer: A double layer of phospholipid molecules that forms the primary structure of all cell membranes, providing fluidity and flexibility.

Protein Channels: Proteins embedded in the cell membrane that allow specific molecules or ions to pass through, acting like specialized doors within the bouncer's control.

Selective Permeability: A property of cellular membranes that only allows certain molecules to enter or exit the cell, ensuring essential nutrients are absorbed while harmful substances are kept out