Describe the function of a cell membrane and its relationship to what happens inside a cell?

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Cell membrane's main function is to act as a selectively permeable barrier to the transport of materials across it. Membrane is made up of phospholipids arranged in a bilayer fashion. The phospholipids are amphithatic in nature, that is, contain both a hydrophobic and a hydrophilic end. The bilayer is so...

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Cell membrane's main function is to act as a selectively permeable barrier to the transport of materials across it. Membrane is made up of phospholipids arranged in a bilayer fashion. The phospholipids are amphithatic in nature, that is, contain both a hydrophobic and a hydrophilic end. The bilayer is so arranged that hydrophilic ends point towards the cell interior and exterior. Hydrophobic ends, on the other hand, point towards each other, inside the membrane. This unique configuration allows the cell membrane to be selectively permeable and allow only certain molecules across the membrane. Since the cell cannot produce everything on its own and cannot dispose of all the molecules it produces, transport across the membrane is needed. The membrane controls the cellular processes by allowing or denying the material exchange in and out of the cell.

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