Question

why the plasma membrane is also called selectively semi permeable membrane​

Answer 1

Answer:

The plasma membrane is called a selectively permeable membrane as it permits the movement of only certain molecules in and out of the cells. ... It allows hydrophobic molecules and small polar molecules diffuse through the lipid layer, but does not allow ions and large polar molecules cannot diffuse through the membrane.

Answer 2

Plasma membrane or cell membrane is also called semi permeable membrane as it allows only the solvent particles to diffuse out of a cell.