1. Cell Junctions and their Functions By Jennifer Romero and Endy Hernandez

2. Cell Junctions -Intercellular bridges located between the cells of animals -2 major types

3. Gap Junction -Made of 6 proteins called connexons -Connect the cytoplasm of adjacent animal cells -Permit free passage of molecules

4. Plasmodesmata Fine strands of cytoplasm Connects cytoplasm of cell wall to that of its neighbors Extension of plasma membrane Proteins regulate permeability Communication and transportation Primary pit fields

5. Tight Junctions -Belts of protein that close extracellular space -Prevent particles from going through the opening of 2 adjacent cells

6. Gap and Tight Junctions Side to Side

7. Desmosomes Holds cells together Attached to filaments of keratin in cytoplasm Contains calcium molecules Aid in electro-chemical communication between adjoining cells Common in epithelia

8. Summary Gap Junctions Plasmodesmata Tight Junctions Desmosomes

9. Works Cited kimball, J. "Junctions between cells." users.rcn.com. N.p., 17 feb 2011. Web. 16 Sep 2013.. Hannahs, Greg. "Plasmosdesmata." biology.kenyon.edu. N.p., n.d. Web. 16 Sep 2013.. Whitmer, Phil. "What Are Cell Junctions?." ehow. N.p.. Web. 16 Sep 2013.. “Junctions Between Cells Simplified.” About Dbriers.com N.p. Web. 16 September 2013. http://www.dbriers.com/tutorials/2012/12/junctions-between-cells- simplified/