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lecture 7- cell communication

lecture 7- cell communication - OBJECTIVES Describe the...

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OBJECTIVES: Describe the extracellular matrix Explain how cells can communicate with each other (both near and far) Describe signal transduction and response
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IV. Cell structure and function C. O and S of Eukaryote Cells xiii. Cell Surface Lots of “stuff” on the surface of the cell: Cellulose (pl) Collagen (an) Polysaccharide
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xiii. Cell Surface a. Cell walls (e.g. plants) Fibrous components: -big, long strands of cellulose (polysacch.) -cross filaments (polysacch.) -gelatinous polysaccharides (pectin) -2 o wall of some species very tough, e.g. lignin in woody tissue b. Extra cellular matrix in animals Fibrous components -protein fibers - collagen -gelatinous mix of polysaccharides -more pliable than cell walls (many proteins from rER)
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V. Cell Connection and Communication A. Middle lamella B. Tight junctions In what type of organisms do you see tight junctions?
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V. Cell Connections and Communication C. Desmosomes D. Selective adhesion - cadherins
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V. Cell Connections and Communication E. Plasmodesmata
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lecture 7- cell communication - OBJECTIVES Describe the...

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