BioTest1Essay10

BioTest1Essay10 - Essay 10 Outside of cell to inside of...

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Essay 10 Outside of cell to inside of cell: Centrosome – microtubules – actin filaments/microfilaments – peripheral membrane proteins – laminin/fibronectin receptors (integrins) – laminin/fibronectin – collagen and elastin Centrosome – clusters of 3 microtubules arranged at right angles to each other. It is the organizing center of the cell CYTOSKELETON – has rigidity and fluidity and it provides for cell structure, holds tissues together. 3 major elements: 1.) microtubules – hollow cylinder made up of dimers of two large proteins – globular alpha and beta tubulin protein molecules. -They give cell structure and are also the basis of cilia and flagella movement. -They serve as tracks along which organelles equipped with motor proteins can move. Microtubule-associated proteins (MAPs) are motor proteins that use ATP and cause 2 microtubules to move in a certain direction. MAPs change shape with hydrolysis of ATP (energy for movement). -They grow out from a centrosome – “microtubule organizing center”
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This note was uploaded on 04/10/2008 for the course BIOL 103 taught by Professor Neale during the Fall '08 term at Georgetown.

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BioTest1Essay10 - Essay 10 Outside of cell to inside of...

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