Question

describe an activity to demonstrate endosmosis and exosmosis. with the help of diagram

Answer 1

Exosmosis means throwing of water by cell eg: soap solutions when put in our hands and washed by the water our hands will feel some thing change in their shape as they deflate Endosmosis means seeping of water by osmosis eg: swelling of raisins when placed in the salty water

Answer 2

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 called endosmosis. 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 called exosmosis.

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