In living things cells must be a solution where water leaves and enters the cell at?

In living organisms, cells must maintain an isotonic environment where the concentration of solutes inside the cell is equal to that outside, allowing water to enter and exit the cell at equal rates. This balance is crucial for cell function and stability, preventing excessive swelling or shrinkage. When the environment is hypertonic or hypotonic, cells may experience osmotic stress, leading to potential damage or dysfunction. Therefore, homeostasis is vital for the survival of cells and overall organism health.