The main components of a cell membrane are phospholipids, proteins, and cholesterol. Phospholipids are the most abundant molecules in the cell membrane and form a bilayer structure that acts as a barrier, regulating the passage of molecules in and out of the cell. Proteins are embedded within the phospholipid bilayer and play key roles in cell communication, transport of molecules, and structural support. Cholesterol helps maintain the fluidity and stability of the cell membrane by preventing the phospholipids from packing too closely together or becoming too fluid. Together, these components work together to create a dynamic and selectively permeable membrane that allows cells to function properly.
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