Demonstration of Endosmosis and Exosmosis

Cells pick up materials like food, water, etc., by various methods

Some of the most common methods include diffusion and osmosis

Water moves from region of higher solute (e.g. sugar) concentration to a region of lower solute concentration through a semipermeable membrane

This movement of water from a region of higher solute concentration to region of lower solute concentration through a semipermeable membrane is called osmosis

When the water concentration outside the cell is higher than inside the cell then the water moves inside this is called endosmosis

When the water concentration outside the cell is lower than inside the cell then the water moves outside this is called exosmosis

An experiment to demonstrate endosmosis and exosmosis

The simple experiment will show the process to demonstrate exosmosis and endosmosis

This experiment requires a few things: Some raisins, Some grapes, Containers, Water, Sugar solution

The procedure of the experiment

Put some raisins in a bowl containing water

Put some grapes in another bowl having thick sugar syrup. Observe the changes for 10-12 hours

Observation made in the experiment

The raisins kept in the water swelled up due to the movement of water from the beaker into the raisins

The grapes kept in sugar solution shrunk due to the movement of water out from the grapes

Conclusion of the experiment

The raisins swell because water concentration outside was higher than in the raisin. This made water to move inside the raisins

The raisins are swollen because the water moved inside i.e. endosmosis occurred.

The grapes, on the other hand, shrunk because the water from inside the grapes moved outside

Since the water is moving from inside the cells to the outside, we say exosmosis occurred

In both cases, water movement occurred and the peel acted as a semi-permeable membrane

Revision

This movement of water from a region of higher solute concentration to a region of lower solute concentration through a semipermeable membrane is called osmosis

When the water concentration outside the cell is higher than inside the cell then the water moves inside this is called endosmosis

When the water concentration outside the cell is lower than inside the cell then the water moves outside this is called exosmosis

The End