The cell membrane (also called the plasma membrane) controls the movement of substances in and out of the cell. It is the outer "layer" of the cell that separates the interior of the cell from its surrounding environment.
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The cell membrane, also known as 'plasma lemma' or 'plasma membrane' controls the movement of substances into and out of the cell. It is a semi permeable membrane which makes it a very important part of protoplasm. It transports the materials across the cell. This movement of substances is accompanied by active or passive transport.
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The cell membrane controls movement of substances into and out of the cell. It is selectively permeable, which means only certain substances can go through it.
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The cell membrane does; it's got pores and transport proteins (among other things) that help organise the influx and efflux of substances.
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Cell membrane.