Question

why is the plasma membrane called semi permeable

Answer 1

Because it allows only certain things to pass through it ..So it is known as semi- permeable..

Answer 2

IT IS BECAUSE , Plasma membrane allows some material to pass through it while on the same time it blocks other material from entering through it… In other words its selects materials that can enter the cell… that`s the reason it is called as selectively permeable membrane.

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