Cell Membrane Coloring Worksheet.docx

Cell Membrane Coloring Worksheet.docx - Cell Membrane...

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Cell Membrane Coloring Worksheet Composition of the Cell M embrane & Functions The cell membrane is also called the plasma membrane and is made of a phospholipid bilayer . The phospholipids have a hydrophilic (water attracting) heads and two hydrophobic (water repelling) tails . The head of a phospholipid is made of an alcohol and glycerol group, while the tails are chains of fatty acids . Phospholipids can move around and allow water and other non - polar molecules to pass through into or out of the cell. This is known as simple diffusion because it does not require energy and the water or molecules are moving with/down the concentration gradient. Another type of lipid in the cell membrane is cholesterol
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that m akes the membrane more fluid. Embedded in the phospholipid bilayer are proteins that also aid in diffusion and in cell recognition. Proteins called integral proteins go all the way through the bilayer, while perpheral proteins are only on one side. Integral proteins are also called transmembrane proteins.
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