EFFECTS OF OSMOSIS ON CELLS WHEN PLACED IN DIFFERENT SOLUTIONS
|SOLUTION TYPE||Concentration of dissolved
|Concentration Gradient||Results in Animal Cells||Results in Plant Cells|
|ISOTONIC||Same as the living cell||Zero||No change||No Change|
|HYPOTONIC||Lower than the living cell||Net water movement into the cell||Cell swells and bursts||** Pressure created by excess water stored in central vacuole|
|HYPERTONIC||Higher than the living cell||Net water movement out of the cell||Cell shrinks
|Central vacuole collapses and plasmolysis occurs|
* Plasmolysis - The shrinkage of cytoplasm resulting from loss of water by osmosis, in a cell placed in a hypertonic solution.
** Turgor Pressure - In plant cells, the pressure on the cell wall that results because of the influx of water in osmosis.
Demonstration of celery in hypotonic and hypertonic solutions
Celery before it was placed in distilled water. Celery before it was placed in salt water
- somewhat limp and soft - firm and in good shape
Celery after standing in distilled water for 4 hours Celery after standing in salt water after 4 hours
- absorbed the water and was very stiff and rigid - the bottom 1/4 has turned very soft and mushy
- hypotonic solution - hypertonic solution