. Why is plasma membrane called a selectively permeable membrane

Best Answer


►The plasma membrane is a membrane that surrounds the cell organelles or covers the cell and is hence known as the cell membrane.

►It acts as a protective layer between the organelles of the cell and the external environment.

►Also, the plasma membrane performs endocytosis and exocytosis.

►The plasma membrane is technically called a selectively permeable membrane.

►Because it only allows certain substances to move in and out of the cell.

►Not every substance or any molecule can freely diffuse or move inside or outside the cell through the plasma membrane.

Final answer:

As the plasma membrane allows only the diffusion of some selective substances through its surface to go in and out of a cell, it can be also called as the selectively permeable membrane.


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