... away from the water. In relating this to a plasma membrane two lines of lipids are present in a membrane, they arrange themselves such that the hydrophilic ends of each lipid on the first line (the inside part of the membrane); the phosphate head is attracted to the fluid within the cell or organelle. The hydrophobic tail is then facing away from the fluid. The outer line of lipids consists of the phosphate head being attracted to the water outside of the cell, with the hydrophobic tail moving away from the water. The resultant of the alignment of these two lines of lipids is a lipid bilayer. The lipid bilayer is primarily the foundation of any plasma membrane. A plasma membrane is a cell organelle that is actively controlling the passage of substances moving in and out of a cell. The plasma membrane, as well as lipids, includes several proteins; the ...

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