Describe an activity to demonstrate endosmosis and exosmosis.

the movement of water from the mesophyl-cell vacuole to a film on the cell surface is due to exosmosis

the movement of water from a film on the cell surface to vapour in the intercellular spaces is due to endosmosis

Endosmosis

When a cell is kept in a hypertonic solution, the water starts moving into the cell from a region of higher concerntration to the region of lower concerntration is calledendosmosis. As a result the cell swells up.

Activity -

1. Buy some raisens
2. Put them into a hypertonic solution (eg. water)
3. Now wait for some time and observe the raisens.
4. The raisens starts swelling up.

Observation- Through this activity we observe that after putting raisens in hypotonic solution the raisens swells up. Their is also an increase in thier weight.

Exosmosis

When a cell is kept in a hypotonic solution, the inner content of cell shrinks as the water moves from the region of higher concerntraion to the region of lower concerntration. This is calledexosmosis.

Activity -

1. Buy some raisens
2. Put them in a hypotonic solution (eg. A sports drink with a lot of salts in it)
3. Wait for a while and observe that the cell starts shrinking

Observation- Through this actvity we observe that after putting raisens in a hypotonic solution the raisens starts losing water content and gets shrinked.

Endosmosis

When a cell is kept in a hypertonic solution, the water starts moving into the cell from a region of higher concerntration to the region of lower concerntration is calledendosmosis. As a result the cell swells up.

Activity -

1. Buy some raisens
2. Put them into a hypertonic solution (eg. water)
3. Now wait for some time and observe the raisens.
4. The raisens starts swelling up.

Observation- Through this activity we observe that after putting raisens in hypotonic solution the raisens swells up. Their is also an increase in thier weight.

Exosmosis

When a cell is kept in a hypotonic solution, the inner content of cell shrinks as the water moves from the region of higher concerntraion to the region of lower concerntration. This is calledexosmosis.

Activity -

1. Buy some raisens
2. Put them in a hypotonic solution (eg. A sports drink with a lot of salts in it)
3. Wait for a while and observe that the cell starts shrinking

Observation- Through this actvity we observe that after putting raisens in a hypotonic solution the raisens starts losing water content and gets shrinked.

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