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A cell membrane is a thin layer that acts as a barrier that separates an individual cell or a cellular compartment from other surrounding structures. This dynamic layer plays an essential part in the...
Membranous protective covering of the cell.--The plasma membrane is the membrane surrounding a cell that separates the cell from its external environment - responsible for barrier function; consists of a phospholipid bilayer (polar head group, nonpolar tails) and associated membrane lipids and proteins (integral-help transport hydrophilic molecules across bilayer, peripheral, and lipid-anchored proteins).