An isotonic solution is a solution that has the same concentration of solute as another solution or cell. In the context of biology, an isotonic solution refers to a solution that has the same salt concentration as that of blood cells. When a cell is placed in an isotonic solution, there is no net movement of water, and the cells volume remains stable. This means that the concentration gradient between the surrounding solution and the solution inside the cell is effectively zero, resulting in no osmotic pressure difference and no net flow of water into or out of the cell.
In the context of a class 9 science curriculum, understanding isotonic solutions is important as it relates to the concept of tonicity and its effects on cells. It is essential for students to comprehend the impact of hypertonic, hypotonic, and isotonic solutions on cells, as well as the principles of osmosis and osmotic pressure.
Isotonic solutions are a fundamental concept in biology and have practical applications in various fields, including medicine, physiology, and biochemistry. Understanding the behavior of cells in isotonic solutions is crucial for comprehending biological processes and phenomena.
