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The upcoming discussion will update you about the differences between Semipermeable Membrane and Selectively Permeable Membranes.
Difference # Semipermeable Membranes:
1. It does not allow passage of solutes through it.
2. It forms a perfect partition between two osmotically active solutions or between a solution and its pure solvent.
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3. It allows entry of only solvent.
4. It is not found in biological world, e.g.. collodion, cellophane.
5. Semipermeable, membrane is used: in dialysis, maintenance of turgidity and measurement of osmotic potential.
Difference # Selectively Permeable Membranes:
1. If allows passage of some selected solutes to a limited extent.
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2. The partition is imperfect because of which even plasmolysed protoplasts get deplasmolysed automatically even when kept in the same hypertonic solution.
3. It allows entry of both solvent and to a selected extent solutes.
4. Almost all biological membranes are selectively permeable.
5. Selectively permeable membrane is useful in maintaining turgidity while retaining the ability to absorb solutes.
