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The function of the cell membrane is not just something that simply controls something. It is more like a barrier that only allows certain molecules inside through certain means. Its through the phospholipid bilayer that smaller molecules which are non-polar can pass through (since the lipid tail are hydrophobic). Other molecules especially the ones that are too big like waste and large sugar compounds must go through carrier proteins, or more technical, transmembrane proteins. It is through either facilitate (passive) transport and active transport that these molecules are allowed to pass through. In short it acts like a bouncer, letting only certain things in. But this analogy is very shallow.

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10y ago
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15y ago

membrane gives protection,shape and size,rigidity etc... to the cell.

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12y ago

The function of the cell membrane is to control what enters and leaves the cell.

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12y ago

It holds the organells in place.

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Q: What is the function of cell membrane in a cell?
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