What is the function of the plasma membrane?

Answer 1

The plasma membrane functions as a selective barrier that separates the interior of the cell from the external environment. It regulates the passage of substances in and out of the cell, allowing certain molecules to enter while keeping others out. It also plays a role in cell signaling and communication, as it contains various receptors and channels that enable the transfer of signals across the membrane. Additionally, the plasma membrane provides structural support and stability to the cell.