isotonic solutions

An isotonic solution is a liquid that has the same concentration of dissolved substances, like salts or sugars, as another solution, typically inside a cell. When a cell is placed in an isotonic solution, there is no net movement of water in or out; the cell remains stable in size. This balance is essential for maintaining cell health and function. Common examples of isotonic solutions include saline used in IV fluids, which matches the concentration of body fluids, helping to keep cells intact without causing them to swell or shrink.