Question

what is semi permeable membrane and how is it helpful in the process of osmosis?

Answer 1

A semi permeable membrane is the one that allows certain molecules to pass through it while it does not allow others. Cell membrane is a semipermeable membrane.

Osmosis can be defined as the movement of water molecules across a semi permeable membrane, from a region of high concentration to a region of low concentration of water. There are two types of osmosis:

Endosmosis: When water enters a cell through osmosis, it is termed as endosmosis.

Exosmosis: When water moves out of a cell through osmosis, it is termed as exosmosis.