12 Cytoskeleton and Cell Structure

12 Cytoskeleton and Cell Structure - structure extending...

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Cytoskeleton and cell structure continued
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Membrane proteins which connect ECM to the microfilaments are integrins , a type of integral membrane protein.
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C. Intermediate filaments class: middle-sized filamentous proteins of various types that play a role in controlling cell shape, and hold cell together in some way e.g . keratin of skin squamous cells: makes cells strong for a barrier function of epithelial (lining) cells e.g. neurofilament in neuronal cells e.g. nuclear envelope laminins
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Cell adhesion molecules of higher animal cells A. Tight junctions: structure formed from a type of protein which spans the gap between one cell and the next to make a seal . e.g. between intestinal lining cells
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B. Desmosome: (=anchoring junction) a strong protein
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Unformatted text preview: structure extending between cells to anchor them. Connected to keratins in the cell C. Gap junction: a large pore creating a cytoplasmic connection between cells for small molecules to pass freely Used for cells that need to communicate via small signal molecules. e.g. embryonic cells, or heart muscle Identify the three intercellular junction structures Label as much as you can besides junctions Terms to know: Endomembrane system Endosymbiont theory Cytoskeleton Microtubules Alpha and beta tubulin Microfilaments Actin Myosin Kinesin Dynein Cilium Flagellum Centrosome Microtubule organizing center Intermediate filaments Keratin Tight junction Desmosome Gap junction...
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12 Cytoskeleton and Cell Structure - structure extending...

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