what is isotonic solution

An isotonic solution is a solution that has the same concentration of solutes and water as the cytoplasm of a cell. When a cell is placed in an isotonic solution, there is no net movement of water, and the cells volume remains stable. Isotonic solutions are important in medicine, as they are used to replace lost fluids in the body. Examples of isotonic solutions include 0.9% saline and lactated Ringers solution.