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The Plasma Membrane By Dupinder Saggu 12J Every living thing is made of many tiny cells. The cell has an outer barrier called the 'Cell Membrane' but is more commonly known as the 'Plasma membrane'. The plasma membrane constitutes the external surface of the cell and is in contact with many other cells. It is about approximately 6-10nm thick, this is too thin to be seen with the naked eye or even a light microscope, to see it you need the aid of an electron microscope. Even with the aid of an electron microscope you still would not be able to see the detail of the plasma membrane because its too thin and that is the reason why most of the knowledge about the plasma membrane are just theories. The plasma membrane has three major functions, the uptake of nutrients, sensing external stimuli (changing response to the environment) and cellulose synthesis. Almost...

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