Maintaining the correct osmolarity is essential for cell viability and function. Cells are highly sensitive to changes in osmolarity, which can affect cell volume, shape, and even lead to cell death. For instance, hyperosmotic solutions can cause cells to shrink, while hypoosmotic solutions can make them swell and potentially burst. This osmotic balance is vital in tissues like the kidney, where filtration and reabsorption processes are highly dependent on osmolarity gradients.
