Cell Membrane Structure And Function. The cell membrane separates the cell from the surrounding interstitial fluid, the main component of the extracellular fluid. Not many substances can cross the phospholipid bilayer, so it serves to separate the inside of the cell from the extracellular fluid.
The cell membrane consists of a lipid bilayer, including cholesterols that sit between phospholipids to maintain their fluidity at various temperatures. The cell membrane separates the cell from the surrounding interstitial fluid, the main component of the extracellular fluid. Cell membrane surrounds the cytoplasm and other organelles in it.
Its function is to protect the integrity of the interior of the cell by allowing certain substances into the cell while keeping other substances out.
Composition of the cell membrane. Membrane, in biology, the thin layer that forms the outer boundary of a living cell or of an internal cell compartment. It is the outermost covering of animal cells. Information pertaining to the function of the cell membrane and its structure is presented in the following paragraphs.