what is a membrane?write its uses
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The cell membrane, also known as the plasma membrane, is a double layer of lipids and proteins that surrounds a cell. It separates the cytoplasm (the contents of the cell) from the external environment.
The primary function of the plasma membrane is to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.
The cell membrane is not a solid structure. It is made of millions of smaller molecules that create a flexible and porous container.
Terms in this set (5)
- protects the cell by acting as a barrier.
- regulates the transport of substances in and out of the cell.
- receives chemical messengers from other cell.
- acts as a receptor.
- cell mobility, secretions, and absorptions of substances.
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