A selectively-permeable biological membrane that separates the interior of all cells from the outside environment.

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Why don't surfactants destroy or incorporate into cell membranes?

How do surfactants remain on the surface of pneumocytes without (1) acting as a detergent or (2) the phospholipids getting incorporated into the membranes of pneumocytes... I'm guessing the answer ...
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How is membrane capacitance related to the increased speed of saltatory conduction?

Here is the original question which inspired my question below. As explained by the answers there, the reason saltatory conduction in myelinated neurons is faster than non-myelinated conduction is ...
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Differential Scanning Calorimetry for bacterial membranes

I would like to study the freezing and melting of bacterial membranes and would like to use DSC to obtain the glass transition temperature of the membrane. However, I am unsure where to find such ...
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Osmosis - occurring in both ways?

So I did a prac to identify the osmotic potential of potato tuber cells. There were 5 test tubes with different concentrations of sucrose (0M,0.25M,0.5M,0.75M,1M); a small slice of potato was placed ...
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The relationship between the currents of intracellular and extracellular ions of a cell

In a cell, assume that only sodium, potassium, chloride and calcium ions can cross the membrane and their currents are: $I_{Na}$, $I_{K}$, $I_{Cl}$ and $I_{Ca}$, across the whole membrane. There is ...
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Domains in cell membrane

How is movement of proteins and lipids between different domains of cell membrane prevented? Why is the noncytosolic layer not able to do lateral movements between domains but cytosolic layer is able ...