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Extracellular components and connections between cells

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Shana Chon

on 30 September 2014

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Transcript of Extracellular components and connections between cells

-Animal and Plant cells are organized into tissue organs/organ systems
-Plasmodesmata are plant cell walls that are entered
-Cytosol passes through the plasmodesmata
-this chemically connects the adjacent cells
Plasma membrane of adjacent cells line the channel continuously.
Small solutes and water pass free cell to cell
Period 3
Shana Chon
Ammarah Bashir
Dulce Alba
Sam Hahn
A Living Unit Greater than the Sum of Its Parts
-panoramic view allowed
>scientists to understand cell's structure and its function.
-Organelles
>works together
>takes lot of energy (ATP from mitochondria)

A Living Unit Greater than the Sum of Its Parts
- Example of cellular integration
-cellular integration includes:
-cytoskeleton
- lysosomes
-plasma membrane
- All these organelles work together to recognize, apprehend, and to destroy bacteria.
-more info pg 122
Cell Walls of Plants Part 1
-plants have cell walls
>protects the cell
>maintains the shape
> prevents uptake of water
-cell wall is thicker than plasma membrane
-Microfibrils made of polysaccharides cellulose
>embedded in matrix of other polysaccharide and protein
Cell Walls of Plants
Part 2
-Microfibrils made of polysaccharides cellulose
>embedded in matrix of other polysaccharide and protein
-Strong fibers in “ground substance” (matrix)
-more info on page 118-119
Extracellular Matrix (ECM) of Animal Cells Part 1

- Animal cells
-no cell walls contains ECM
-ECM
- made up of glycoproteins
- Collagen
- most abundant glycoprotien in ECM
- forms the outside of cells with strong fibers
-accounts for half of the total amount of proteins in a human body
Extracellular components and connections between cells
Intercellular Junctions
Part 1
Intercellular Junctions Part 2
Animals: 3 Main Intercellular Junctions
-Tight Junction: It prevents the moving of fluids across the layers of cells.
-Desmosomes: Called anchoring junctions. They connect cells together to make a sturdy layer.
-Gap Junctions: Also know as communicating junctions. They are important since they are necessary for communication between cells
-more info on pg 120-121

Extracellular Matrix (ECM) of Animal Cells
Part 2
-Fibronectin and other ECM proteins attach to integrins.
- Integrins
- receptor proteins
-transmit changes between ECM and cytoskeleton.
-Influence change inside and outside the cell
-ECMs
-regulate cells behavior
- Example of ECM
-influences changes in the genes of nucleus
-more info on pg 119-120
Cell Walls of Plants
Part 3
Extracellular Matrix (ECM) of Animal Cells
Part 3
Intercellular Junctions Part 3
A Living Unit Greater than
the Sum of Its Parts
Work Cited
Campbell Neil A, Reece Jane B. The Cell. In: AP Edition Biology. 7th ed. San Francisco, CA: Benjamin Cummings; 2005 pages 118-122

http://www.seehint.com/catalog/2011%5C2011_09/4_20ecm.jpg
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