1. Osmosis

2. I am trying to learn through osmosis.
diffusion of water
Water molecules will move across a membrane towards the space that has more solute molecules. Common solute molecules include salt, sugar, starch and glucose.
     
I am trying to learn through osmosis.

3. Water moves in three directions
Isotonic
Hypertonic
Hypotonic

4. Cell neither gains nor loses water and remains unchanged.
                                     
Isotonic solution
"ISO" means the same
Cell neither gains nor loses water and remains unchanged.
Concentration of solute (salt or glucose) is equal on both sides.
animal cell - normal              
plant cell -  flaccid (limp)

5. The word "HYPER" means more
                                     
Hypertonic solution
The word "HYPER" means more
More solute molecules outside the cell then inside the cell
Causes water to be moved in that direction
Cell loses water and shrinks.
This is a problem for many marine organisms.
animal cell - crenated           
plant cell -   plasmolyzed

6. The word "HYPO" means less
                                     
Hypotonic solution
The word "HYPO" means less
There are less solute molecules outside the cell and water will move into the cell.
The cell gains water and swells.
This is a problem for many freshwater organisms.
animal cell - lysed
plant cell - turgid