How does the cell membrane help maintain homeostasis?

As you are aware, homeostasis is the capacity to maintain living conditions. Additionally, cells are subject to the conditions in which they find themselves. To prevent fluctuations in osmotic pressure, they have a membrane; to prevent necessary particles from exiting their "bodies"; to permit only a minimal amount of particles to enter unless absorbed by a vesicle; to facilitate the diffusion of materials during chemical reactions, such as the production of ATP or the pumping of protons; and to use the membrane in these processes, they require both the materials and the membrane.

TL:DR: It's a semipermeable fluid barrier, a biochemical scaffold that can withstand some pressure, and it permits material import and export—all essential functions for a cell to sustain life.

By controlling the flow of substances into and out of the cell, managing its internal environment, and giving the cell structural support and protection, the cell membrane contributes to the maintenance of homeostasis.