Cell Membranes
- Cell membranes are biological barriers built mainly from phospholipids and proteins.
- Phospholipids provide the basic lipid barrier of a cell membrane.
- Membrane proteins give the cell membrane many of its specific jobs, including transport, signaling, and cell-to-cell communication.
- Cell physiology depends on cell membranes because membranes separate fluid compartments while still allowing controlled movement of selected substances.
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