Transcript Hypotonic, Hypertonic and Isotonic
Hypotonic, Hypertonic and Isotonic
How diffusion works in different solutions.
Isotonic Solution
Latin: “Iso” means equal. So…
Isotonic means that it has the same solute concentration on the inside of the cell as the outside of the cell.
Inside the Cell: 20% solute, 80% water Outside the Cell: 20% solute, 80% water
Isotonic
As a result, there is no net movement of water molecules. The concentration on both sides of the membrane remains the same.
Inside the Cell: 20% solute, 80% water Outside the Cell: 20% solute, 80% water
Hypertonic Solution
Latin: “Hyper” means over or above. So…
Hypertonic means there is a higher solute concentration on the outside of the cell, than on the inside of the cell.
Inside the Cell: 20% solute, 80% water Outside the Cell: 40% solute, 60% water
Hypertonic Solution
Water particles are going to move OUT of the cell to even out the concentration.
This causes the cell to shrivel.
Hypotonic Solution
Latin: “Hypo” means low or below. So…
Hypotonic means that it has the lower solute concentration on the outside of the cell, than on the inside of the cell.
Inside the Cell: 20% solute, 80% water Outside the Cell: 10% solute, 90% water
Hypotonic Solution
Water molecules are going to move into the cell, to even out the concentrations.
The causes the cell to get larger.
You Try
1.
What is the % of water inside the cell?
2.
What is the % of water outside the cell?
3.
Will osmosis occur? If so, in what direction?
4.
Will the cell shrink or swell?
5.
This picture shows a cell in a ______________ solution.
10% glucose 20% glucose
You Try
1.
What is the % of water inside the cell?
2.
What is the % of water outside the cell?
3.
Will osmosis occur? If so, in what direction?
4.
Will the cell shrink or swell?
5.
This picture shows a cell in a ______________ solution.
20% glucose 20% glucose
You Try
1.
What is the % of water inside the cell?
2.
What is the % of water outside the cell?
3.
Will osmosis occur? If so, in what direction?
4.
Will the cell shrink or swell?
5.
This picture shows a cell in a ______________ solution.
40% glucose 20% glucose
Real World Examples
Why does my skin wrinkle in the bath?
We are sitting in a hypotonic solution So water rushes in, causing our skin cells to swell Our swollen cells are too large to fit on our bodies, causing wrinkles to occur
Why does a slug die when you pour salt on it?
The slug is put in an intense hypertonic solution So water rushes out of the slug, causing it to lose water rapidly – thus, the slug dies
Real World Examples
Why can ’t you put a salt-water fish in a fresh-water aquarium?
The fish is put in a hypotonic solution.
So water rushes in, causing the fish to gain too much water, which rupture ’s the fish’s cells, causing it to die
How can a fish even live in salt-water?
Fish live in a hypertonic solution, so ordinarily water wants to rush out Fish have to drink lots of salt water to make the concentrations even – then they pump out the salt using active transport