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Cytoskeleton Functions (4)
- 1.provides strenght to cell
- 2.maintains and changes cell shape
- 3.moves contents inside cell
- 4.moves whole cells
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The three kinds of cytoskeleton
- 1Actin microfilaments: the thinnest in diameter
- 2. Intermediate filaments are medium sized in diameter
- 3.Microtubules are the largest in diameter
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Which types of cytoskeltons are involved with cell movement?
- -Actin microfilaments
- -Microtubles
- -because they have polarity (opposites)
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Actin microfilaments
- -Made of actin, ag lobular protein
- -activated by binding to ATP
- -found in periphery of cell
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Actin movement
- -actin interacts with a motor protein called myosin
- -myosin forms thick filaments with numerous motor heads
- -myosin moves across the actin on its head
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Intermediate Filaments
- -medium sized
- -skin, hair, and nails made of keratin
- -ones in nucleus made of lamins
- -not involved in movement because its not polar
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Microtubles
- -made of tubulin
- -large hollow tube like
- -Kinesis and dyneins have motor heads
- -use ATP to energize
- -carry organlles and vesicles
- -crucial in cell division
- -9+2 arrangement
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