Cell Membrane Definition And Function

The plasma membrane protects the cell from damage caused by environmental exposure.

Cell membrane definition and function. Cell Membrane surrounds the cytoplasm and other organelles in it. In 1972 two scientists SJ Singer and CL Nicolson proposed fluid mosaic model. Cell Membrane is the second layer in plant cell present below the cell wall while in animal cell it is the first layer.

The cell membrane is present in all the cells. This function is very vital in animal cells which lack a cell wall. It protects the integrity of the cell along with supporting the cell and helping to maintain the cells shape.

A cell membranes phospholipids and proteins arranged in a bilayer give it semi-permeability allowing some. The cell membrane is the outermost limit of the cell but it is more than a simple envelope surrounding the cellular contents. Like a drawbridge intended to protect a castle and keep out enemies the cell membrane only allows certain molecules to enter or exit.

The membrane also contains membrane proteins including integral proteins that go across the Organelle a specialized subunit within a cell that has a specific function and is usually separately enclosed within its own membrane. It is also simply called the cell membrane. The cell membrane is a multifaceted membrane that envelopes a cells cytoplasm.

It is a selectively permeable barrier meaning it allows some substances to cross but not others. Cell membrane also called plasma membrane cytoplasmic or protoplasmic membrane. The membrane also contains membrane proteins including integral.

Cell membrane is a biological membrane that separates the interior of the cell from the outside space and protects the cell from its environment. The cell membrane keeps the organelles of the cell from drifting away and controls the movement of things into and out of. Although some cells produce a cell wall above the cell membrane the cell membrane is the only protective.