* Water potential: Water naturally moves from areas of high water potential (more water) to areas of low water potential (less water). A higher solute concentration lowers water potential.
* Osmosis: Water moves across the cell membrane from an area of higher water potential (inside the cell) to an area of lower water potential (outside the cell).
* Cell shrinkage: As water leaves the cell, the cell shrinks and the cytoplasm pulls away from the cell membrane. This is known as plasmolysis.
Consequences of Cell Shrinkage:
* Loss of turgor pressure: Turgor pressure is the internal pressure that helps maintain the cell's shape and rigidity. Shrinkage reduces turgor pressure, which can be detrimental to plant cells.
* Impaired cell function: The cell's ability to carry out its normal functions can be disrupted as enzymes and other cellular components become more concentrated and may not work properly.
* Cell death: If the cell loses too much water, it can become damaged and die.
Examples of Hypertonic Environments:
* Saltwater: Fish that live in saltwater have evolved mechanisms to cope with the hypertonic environment.
* High sugar concentrations: Pickling and preserving foods with high sugar concentrations draw water out of bacteria, preventing spoilage.
In summary: When a cell loses more water than it gains, it shrinks and dehydrates. This can have detrimental effects on the cell's function and even lead to death.
