Q. 13.9( 118 Votes )

Why is plasma membrane called a selectively permeable membrane?

Answer :

  • The cell membrane is also known as the plasma membrane.
  • It is the outermost covering of the cell that separates the contents inside of the cell from its outside environment.
  • Plasma membrane only allows some materials, like some small molecules and water molecules, to enter the cell or leave from the cell.
  • Not everything that comes in contact with the cell membrane can enter the cell because of this.
  • So, the plasma membrane is known as a selectively permeable membrane. It selects or chooses what goes in and out of the cell. 

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