Question

what does a cell membrane do ?

Answer 1

The cell membrane, also known as the plasma membrane, plays a crucial role in the structure and function of cells. It serves as a protective barrier that separates the interior of the cell from the external environment, allowing the cell to maintain its internal environment despite changes in the external conditions. The cell membrane also controls the movement of substances in and out of the cell, regulating the passage of nutrients, ions, and waste products. Additionally, the cell membrane contains various proteins that play roles in cell signaling, adhesion, and communication with other cells. In summary, the cell membrane serves as a boundary that protects the cell and controls its interactions with the external environment.