What is the difference between Selectively permeable and Semi-permeable? What about in the definition of osmosis and plasma membrane?

Dear student,
Please find below the answer:

Both semipermeable and selectively permeable membranes are the same.
The membranes which allow the passage of only a few selective substances across it are referred to as selectively permeable membranes or semi-permeable.

The plasma membrane is a semi-permeable membrane present outside the cell. It allows certain molecules to pass through it while stopping others.

Osmosis is the movement of solvent molecules from a region of their higher concentration to a region of their lower concentration, through a differentially permeable membrane.

​​​​​Hope this clears your doubt.
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