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Cell Junctions

Cell Junctions. anchoring. Types of Cell Junctions. In plants: Plasmodesmata In animals: ECM (Extra-cellular Matrix)- Tight Junctions Anchoring Junctions Gap Junctions. Extracellular Matrix. Sticky layer of glycoprotein holding cells together

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Cell Junctions

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  1. Cell Junctions anchoring

  2. Types of Cell Junctions • In plants: • Plasmodesmata • In animals:ECM (Extra-cellular Matrix)- • Tight Junctions • Anchoring Junctions • Gap Junctions

  3. Extracellular Matrix • Sticky layer of glycoprotein holding cells together • The extracellular matrix (ECM) is the largest component of normal skin and gives the skin its unique properties of elasticity, tensile strength and compressibility.

  4. Tight Junction • Seals adjacent cells in a narrow band just beneath their surface. • No leaks. • EX: blood vessels

  5. Cellular Tight Junction • Biomembrane II: • Membrane Junctions (click on review and Then animate)

  6. Anchoring Junctions • Rivet cells together with cytoskeleton structures, but still allow materials to pass along the spaces between cells

  7. Where you need to handle stress like: skin Heart Intestine Concept 4 Review:(desmosomes) Where found

  8. Communicating Junctionsor Gap Junctions • permit small molecules to shuttle from one cell to another and thus directly link the interior of adjacent cells.

  9. Communicating Junctions“Gap Junctions” • Where found: • cardiac muscle for heartbeat • Hormonal stimulation • Nerves in brain release a neurotransmitter

  10. Gap Junctions • Concept 4 Review: Gap Junctions (click)

  11. Plasmodesmata • Channels connecting PLANT CELLS

  12. Plasmodesmata

  13. Plasmodesmata • Allows small molecules and water to pass between plant cells

  14. Can you identify the cell junctions?

  15. Can you identify the cell junctions? Tight junction Anchoring junction Gap junction

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