Health Sciences 2300A/B Chapter Notes - Chapter 3: Adherens Junction, Tight Junction, Epithelium
25 May 2016
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Document Summary
There are 4 basic types of tissues based on their structure and function: epithelial tissue covers body surfaces and lines hollow organs, body cavities, and ducts; it also forms glands. Allows body to interact with internal and external environments: connective tissue protects and supports the body and its organs. Epithelial and connective tissue and widely dispersed in the body. Most epithelial cells and some muscle and nerve cells are joined tightly into functional units. Cell junctions are contact points between the plasma membrane of tissue cells. The five most important cell junctions: tight junctions transmembrane proteins fuse together and cut off passageways between cells. Chadrins of one cell attach to the chadrins of another cell. These junctions help the cells resist separation in contractile activities: desmosomes contain plaque and have transmembrane proteins that attach to other cell"s intermediate filaments. This contributes to the stability of the cell.
