Why is plasma membrane called selectively permeable membrane?

The Plasma Membrane is a selectively permeable membrane as it only allows entry and exit of some selected molecules into and out of the Cells. It also prevents movement of some other materials, therefore the plasma membrane is called a selectively permeable membrane. read more

The plasma membrane of eukaryotic cells permits passage of lipids and sterols (neutral) but charged and polar molecules and ions (including water) are regulated by a number of transport proteins. read more

The plasma membrane is known as a selectively permeable membrane because it 'permits' only certain materials to enter and exit the cell through its pores; that is, the plasma membrane is very selective about what enters and exits the cell. not everything is allowed to exit and enter the cell. read more