* Osmosis is the movement of water across a semipermeable membrane from a region of high water concentration to a region of low water concentration. This movement is driven by the difference in water potential between the two regions.
* Cells have a semipermeable membrane. This membrane allows water to pass through but restricts the movement of other substances.
* Inside the cell, there are solutes (dissolved substances) that lower the water concentration. This means there's a higher water concentration outside the cell.
* Water moves from the area of higher concentration (outside the cell) to the area of lower concentration (inside the cell) to try and equalize the concentration. This is why there is a net movement of water into the cell.
Here's a simple analogy:
Imagine a glass of water with a semipermeable membrane separating it from a concentrated salt solution. Water will move across the membrane from the pure water side (high water concentration) to the salt solution side (lower water concentration) until the concentration on both sides is equal.
Important Note: The direction of water movement in osmosis depends on the concentration of solutes in the cell and its surroundings.
