They form the phospholipid membranes that surround the cell and intracellular organelles such as the mitochondria.
Lipid Bilayer Structure. The lipid bilayer is a universal component of all cell membranes. Its role is critical because its structural components provide the barrier that marks the boundaries of a cell. The structure is called a lipid bilayer because it is composed of two layers of fat cells organized in two sheets. Lipids are fats, like oil, that are insoluble in water. There are two important regions of a lipid that provide the structure of the lipid bilayer. Each lipid molecule contains a hydrophilic region, also called a polar head region, and a hydrophobic, or nonpolar tail region. Phospholipids are a class of lipids that are a major component of all cell membranes. They can form lipid bilayers because of their amphiphilic characteristic. The structure of the phospholipid molecule generally consists of two hydrophobic fatty acid tails and a hydrophilic head consisting of a phosphate group.  The phsopholipid bilayer is the thin polar cell membrane comprised of two layers of lipids. This membrane surrounds a cell to keep substances (ions, proteins, etc) in or out of the cell, but also allow selected substances to pass through the cell membrane as required.  The phsopholipid bilayer is the thin polar cell membrane comprised of two layers of lipids. This membrane surrounds a cell to keep substances (ions, proteins, etc) in or out of the cell, but also allow selected substances to pass through the cell membrane as required. The phospholipid bilayer is fluid due to the unsaturated hydrocarbon tails of phospholipids found in the hydrophobic region. These unsaturated hydrocarbon tails do not have al … l the hydrogen it can possibly have, so carbon forms a double bond. Your cells are surrounded by a very important type of lipid, called phospholipids. Phospholipids consist of a hydrophilic (or 'water loving') head and a hydrophobic (or 'water fearing') tail. Phospholipids like to line up and arrange themselves into two parallel layers, called a phospholipid bilayer. The lipid bilayer is a thin polar membrane made of two layers of lipid molecules. These membranes are flat sheets that form a continuous barrier around all cells.  Phospholipids serve a major function in the cells of all organisms: they form the phospholipid membranes that surround the cell and intracellular organelles such as the mitochondria. The cell membrane is a fluid, semi-permeable bilayer that separates the cell's contents from the environment, see animation below.  The cell membrane is called the phospholipid bilayer because the phospholipids form two distinct lay … ers. In each layer, the phospholipid molecules lie with the hydrophilic heads at the membrane surface and the hydrophobic tails on the inside, in association with cholesterol and small quantities of other lipids. The phospholipid bilayer is fluid due to the unsaturated hydrocarbon tails of phospholipids found in the hydrophobic region. These unsaturated hydrocarbon tails do not have al … l the hydrogen it can possibly have, so carbon forms a double bond. One major role of phospholipids in cells is to form membranes. Membranes in cells are phospholipid bilayers, which are barriers that prevent charged particles and large molecules from moving across them. The outer skin of the cell is a phospholipid bilayer. Eukaryotic cells also have skin surrounding defined organelles with different functions inside them. noun. The two layers of phospholipids arranged in such a way that their hydrophobic tails are projecting inwards while their polar head groups are projecting on the outside surfaces. Supplement. This arrangement of phospholipids in bilayer is used to describe the cell membranes of many animal and plant cells. The two layers of phospholipids are arranged in a way that their hydrophobic tails are projecting to the interior whereas their hydrophilic heads are projecting the exterior.
http://www.sparknotes.com/biology/cellstructure/cellmembranes/section1.html https://en.wikipedia.org/wiki/Phospholipid http://www.answers.com/Q/What_is_the_function_of_a_phospholipid http://www.answers.com/Q/What_is_the_function_of_the_phospholipid_bilayer http://study.com/academy/lesson/what-is-a-phospholipid-structure-functions-composition.html https://en.wikipedia.org/wiki/Lipid_bilayer http://telstar.ote.cmu.edu/biology/MembranePage/index2.html http://www.answers.com/Q/What_is_the_function_of_the_phospholipid_bilayer http://classroom.synonym.com/structural-role-phospholipids-play-cells-16381.html http://www.biology-online.org/dictionary/Phospholipid_bilayer
what is the function of phospholipids bilayer