Cell Membrane Definition And Function
Cell membrane also called plasma membrane cytoplasmic or protoplasmic membrane.
Cell membrane definition and function. It is an actively functioning part of the living material and many important metabolic reactions actually take place on its surface. The cell membrane supports and protects the cell. The cell membrane is present in all the cells.
The cell membrane gives the cell its structure and regulates the materials that enter and leave the cell. Although some cells produce a cell wall above the cell membrane the cell membrane is the only protective. The cell membrane keeps the organelles of the cell from drifting away and controls the movement of things into and out of.
In 1972 two scientists SJ Singer and CL Nicolson proposed fluid mosaic model. This membrane anchors the cytoskeleton a cellular skeleton made of protein and contained in. It is also simply called the cell membrane.
It is semi-permeable and regulates the materials that enter and exit the cell. Like a drawbridge intended to protect a castle and keep out enemies the cell membrane only allows certain molecules to enter or exit. Cell Membrane is the second layer in plant cell present below the cell wall while in animal cell it is the first layer.
The plasma membrane comprises lipids and proteins. It is a selectively permeable barrier meaning it allows some substances to cross but not others. The membrane also contains membrane proteins including integral.
Unlike Plasma Membrane other organelles do not perform such functions. Cell membrane thin membrane that surrounds every living cell. 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.
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