Question

why is plasma membrane is called selectively permeable membrane

Answer 1

plasma called selectively permeable membrane b'coz it allow fats and other usefull things to enter in a atom

Answer 2

Hello!
》Plasma membrane allows components, which are useful to the survival of cell,to enter the cell
》Thus, it acts a security at the entrance
》Because it's selectively permits the substances to enter
》Plasma membrane is also called as Selectively permeable membrane

hope helped!