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24 Cards in this Set
- Front
- Back
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What do cytoskeletons do in eukaryotic cells? (2) |
Support Maintain Cellular Structure |
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What are the 3 types of fibres |
Microfilaments Intermediate filaments Microtubules |
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What are microfilaments |
Two protein chains loosely twinned together |
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How do microfilaments 'move' (3) |
contract crawl pinch |
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What are microtubules (2) |
largest of cytoskeletal elements demers of alpha and beta subunits |
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how stable are intermediate filaments |
very stable
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What is a centrosome |
region surrounding nucleus in almost all animal cells |
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what is a centrosomes specialised unit called? |
centrioles |
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what kind of cells have centrioles |
animal and protozoa |
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what are centrosomes function (3) |
organisation of mitotic spindle during cell division completion of cytokinesis. organises microtubules in cytoplasm |
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What 2 ways can cells move |
Cell cytoskeleton
Cilia/Flagella |
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What are chemotaxins |
Cells that move towards chemical signal |
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What are chemotaxins critical for? |
early development
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what are chemotaxins involved in? |
migration of neurons during development or lymphocyte migration in blood vessels.
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What are microtubules composed of? |
Tubulin |
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Where do microtubules extend from |
centrosome |
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what are microtubules critical for |
maintaining cell architechture |
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what do integrins link the ECM to? |
Cell cytoskeleton |
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Integrins influence cell behaviour via what? |
cell signalling pathways |
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What forms a protective layer over animal cell surfaces? |
Proteoglycans |
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What does the ECM support |
cells in the tissue |
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What percentage of the total amount of protein in the body does collagen make up? |
40% |
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WHat are proteoglycans |
small protein molecules linked to several carbohydrate chains |
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Where are elastic fibres prominent? |
In connective tissue of the skin, lungs, arteries. |
