00:02
The celery stock that are immersed in fresh water for several hours become stiff and hard.
00:06
Now, the celery stick left in 0 .15 molar resource solution become lymph and salt.
00:12
So from this, what can we deduce from the celery stock cell? so this actually shows behavior of plant cell in different solutions with different tenacities.
00:21
So on a screen, i'm showing the three different solutions.
00:25
The first one is called the hypertonic solution.
00:27
So when a plant cell sits in a hypotonic solution, that means the solution has a higher concentration of salt than inside of the cell.
00:41
So in this condition, you have higher salt in a solution than inside of the cell.
00:47
That means the water has a greater concentration inside than outside of the cell.
00:53
So due to the higher water concentration, the osmosis actually drives.
00:57
The water to run out from inside of the cell, specifically the central vacuum into the hypotonic solution.
01:06
So you can see that i used an arrow to show the movement of the water molecule.
01:10
So due to the loss of water, the plant cell looks shriveled.
01:15
And then you can see the cell membrane is pulling away from the cell wall, which is the square outer layer of the cell.
01:21
So the cellarice cell will become limp in a hypotonic solution.
01:26
The second solution is called isotonic solution.
01:30
Iso -tonic solution.
01:30
Isso means the same.
01:31
So the concentration of salt is the same in and out of the cell.
01:35
And due to the same concentration of salt, the water osmosis is also the same in and out of the cell.
01:41
I use two arrows to show that the same amount of water runs in and out of the cell in isotonic solution...