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27 Cards in this Set
- Front
- Back
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What is the cytoskeleton?
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the cytoplasm of the cell is crisscrossed by several types of protein fibers collectively called the cytoskeleton
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The cytoplasm of the cell is crisscrossed by several types of protein fibers collectively called what?
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the cytoskeleton
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What helps maintain a cell's shape and either anchors the organelle or assists their movement, as appropriate?
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Cytoskeleton
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What rae much larger than actin filaments in the cytoskeleton?
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microtubules
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What is a tubulin?
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A longitudinal row of a protein contained within microtubuels
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What is the regulation of a microtubule assembly under the control of?
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centrosome
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What is a centrosome?
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a microtubule organizing center that contains a pair of centrioles (short cylinders of microtubles of unknown function)
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what help maintain the shape of the cell and act as tracks along which organelles omve?
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Microtubules
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what do microtubules do?
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help maintain the shape of the cell and act as tracks along whihc organelles move.
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During cell division, microtubules from what which assist the movement of chormosomes?
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spindle fibers.
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What assist in the movement of chromosomes?
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spindle fibers
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What are actin filaments?
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Made of protein called actin, are long, extremely thin fibers that usually occur in bundles or other goupings
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What are long, extremely thin fibers that usually occur in bundles or other groupings?
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Actin filaments
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What do microvilli contain that aids in cell movement?
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actin filaments
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What are intermediate filaments?
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intermed in size between microtubules and actin filaments.
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What do the ciliated cells that line our respiratory tract do?
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sweep debris trapped within mucus back up the throat, which helps keep the lungs clean.
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What moves an egg along the oviduct where it will be fertilized by a flagellated sperm?
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ciliated cells
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Although a cilium is aobut 20 times shorter than a flagellum, both have the same what?
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organization of microtubules within a plasma membrane covering
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What are motor molecules powered by?
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ATP
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What allows the microtubules in cilia an dflagella to interact and bend, thereby move?
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motor molecules powered by ATP
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What do cilia and flagella grow from?
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basal bodies
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What have the same organizaiton as centrioles?
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basal bodies
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what are basal bodies?
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structures that have the same organization as centrioles, which are located in centrosomes
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What are centrioles and what is a centrosome?
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centrioles are short cylinders of microtubules of unknown function, centrosomes are a microtubule organizing center that contains a pair of centrioles
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What would malformed microtubuels in cilia and flagella lead to?
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respiratory infections, because the ciliated cells lining the respiratory passage fail to keep their lungs clean
They are also unable to reproduce naturally due to the lack of ciliary action to move the egg in a female, or the lack of flagella action by sperm in a male. |
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What would be responsible for the inability to move the egg in a female or for repiratory infections?
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malformed microtubules in cilia and flagella.
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What do cilia and flagella grow from?
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basal bodies
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