Question

why is plasma membrane called a selectively premeable membrane ?​

Answer 1

Answer:

Plasma membrane is called as a selectively permeable membrane because it regulates the flow of substances from within to outside of the cell. That is it makes sure that only selected particles enter.

If plasma membrane ruptures or breaks down then molecules of some substances will freely move in and out of the cells. As the plasma membrane acts as a mechanical barrier, the exchange of material from its surroundings through osmosis or diffusion in a cell won’t take place.

Answer 2

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. ... If plasma membrane ruptures or breaks down then molecules of some substances will freely move in and out of the cells.

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