Cellular homeostasis refers to the process by which cells maintain a stable internal environment despite changes in external conditions. This balance is crucial for the cell's survival and function, allowing it to regulate factors such as temperature, pH, and ion concentrations. Cells achieve this stability through various mechanisms, including membrane transport and signal transduction pathways. To maintain homeostasis, cells utilize structures like cell membranes to control the movement of substances in and out. For example, active transport helps move ions against their concentration gradient, while passive transport allows substances to flow naturally. Overall, cellular homeostasis is essential for the proper functioning of all living organisms.