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- separates intracellular fluids from extracellular fluids
- plays a dynamic role in cellular activity
- Glycocalyx is a glycoprotein area abutting (next to) the cell that provides highly specific biological markers by which cells recognize or another.
- differ in the kind and amount of lipids they contain.
- Glycolipids are found only in the outer membrane surface.
- 20% of all membranes lipid is cholesterol.
1. Tight Junction: impermeable junction that surround the cell.
2. Desmosome - anchoring junctions scattered along the sides of cells
3. Gap Junction - a nexus (bond) that allows chemical substances to pass between cells
Chemical Composition of the Plasma Membrane
Membrane Junctions