Learn about the cell membrane, a thin layer that surrounds every living cell and regulates its interactions with the environment. Find out how the cell membrane is composed of lipids and proteins, and how it performs various functions such as transport, barrier, and movement.

The cell membrane (also known as the plasma membrane or cytoplasmic membrane, and historically referred to as the plasmalemma) is a biological membrane that separates and protects the interior of a cell from the outside environment (the extracellular space).

Learn about the cell membrane, a thin layer that surrounds the cytoplasm of all cells and allows certain substances to pass through. Find out its main components, such as lipids, proteins, and carbohydrates, and its various functions, such as selective permeability, signal transduction, and cell communication.

Learn how cell membranes are made of lipids and proteins that regulate what enters and exits the cell. Explore the roles of membrane transport, receptor and enzyme proteins in cell communication and metabolism.

Learn about the cell membrane, a thin semi-permeable layer that protects and supports the cell. Find out how proteins, lipids, phospholipids, and cholesterol form the membrane and how it regulates cell growth and communication.

The cell membrane, also known as the plasma membrane, is a thin, semi-permeable barrier that surrounds and encloses the contents of a cell. It separates the interior of the cell from the external environment, protecting the cell and regulating the movement of substances in and out of the cell.

Learn about the biological membrane that forms the outer boundary of a cell or an organelle. Find out how membranes keep toxic substances out, allow specific molecules to pass, and separate metabolic processes.

Functions of the cell membrane. References and Sources. Interesting Science Videos. Composition of Cell membrane. Most of the cell membrane is composed of 40-50 % protein and 50-60 % lipids.

Functions of the Cell Membrane. Cell membranes are vital for the normal functioning of all the cells in our bodies. Their main functions consist of: Forming a continuous, highly selectively permeable barrier – both around cells and intracellular compartments.