Question

what is selective permeability? why does the plasma membrane need to be semi permeable instead of permeable?​

Answer 1

Answer:

Selective permeability is a property of cellular membranes that only allows certain molecules to enter or exit the cell. ... Movement across a selectively permeable membrane can occur actively or passively. For example, water molecules can move passively through small pores on the membrane.

So since it only allows small and non polar molecules to pass in, it is described as partially permeable or semi-permeable. Those ions and molecules restricted by the phospholipids pass in and out of the cell via membrane proteins.

Explanation:

Answer 2

Answer:

selectively permiable membrane allow movement of solvent and few selected solute

Explanation:

plasma membrane is selectively permeable not semi because not all solutes are required by cell it requires only some selected solute

P.S:cellophane membrane is semi permeable

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