What is the function of the cell membrane?

The cell membrane serves a crucial role in maintaining homeostasis within the cell by controlling the movement of substances in and out. This semi-permeable barrier allows essential nutrients to enter the cell while facilitating the removal of waste products. The lipid bilayer structure of the membrane, along with embedded proteins, creates selective permeability, which is vital for the cell’s survival and function.

By regulating what enters and exits, the cell membrane helps maintain the appropriate internal conditions necessary for biochemical processes, such as pH levels and ion concentrations. This selective control is essential for various cellular activities, including nutrient uptake, communication with other cells, and response to environmental changes. Thus, the function of the cell membrane is integral to the overall operation of the cell.