Composition of the Cell Membrane & Functions?

Jami(:

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The cell membrane is also called the plasma membrane and is made of a phospholipid bilayer. The phospholipids have a hydrophilic (water attracting) _______ and two hydrophobic (water repelling) _______. Phospholipids can move horizontally and allow water and other nonpolar/hydrophobic molecules to pass through into or out of the cell. This is known as simple _______ because it does not require ________ and the water or molecules are moving _______ the concentration gradient.
 
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