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10 Cards in this Set
- Front
- Back
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Tissue
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make up organs; tissues are made up of cells; layers of cells |
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Organ
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a group of tissues in a living organism that have been adapted to perform a specific function
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How does tissue structure determine function?
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Help you identify tissue structure. Without it we would be susceptible to all sorts of diseases. |
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Describe the structure and the function of microtubules. |
hollow tube formed from tubulin dimers. Alpha-tubulin and beta-tubulin make a tubulin dimer. Mostly maintain cell shape
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Describe the structure and the function of microfilaments.
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a double helix of actin monomers. Made up of actin proteins.
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Describe the structure and the function of intermediate filaments.
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a strong fiber composed of intermediate filament proteins. Mainly used for mechanical support.
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How are microtubules/filaments dynamic?
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You can add more sub-units to one end and you can take away from the other end. It’s not a hard fast structure it can change. |
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Explain how motor proteins help in intracellular movement and muscle contraction.
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Myosin undergoes a conformational change, sliding actin filaments relative to myosin. The result is a shortening of the muscle cell.
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Explain the structure of cilia and flagella and how they move. |
They are arranged in a 9+2 arrangement. Around the outside there are 9 pairs of 2 and in the center there is a group of 2. Figure 10-13 The Dynein arms slide along the tubules
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How is actin involved in moving a cell such as an amoeba forward? |
The actin microfilaments grow and push it forward. They form a lamellipodium with branching microfilaments. At the back of the cell the actin just grabs and pulls them forward. |
