Cell Biology: Cytoskeleton
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Questions and Answers

What is the main function of the cytoskeleton in animal cells?

  • To provide structural support, facilitate movement, and aid in the transport of substances within the cell (correct)
  • To synthesize proteins
  • To store genetic information
  • To regulate cell division

    • What is the diameter of microtubules?

  • 10 nanometers
  • 50 nanometers
  • 100 nanometers
  • 25 nanometers (correct)

    • What is the prefix 'cyto' in cytoskeleton?

  • Ribosome
  • Mitochondria
  • Nucleus
  • Cell (correct)

    • What are the blue structures labeled in the diagram?

    <p>Ribosomes</p> Signup and view all the answers

    What is the function of the mitotic spindle?

    <p>To separate chromosomes during cell division</p> Signup and view all the answers

    What are microtubules involved in, aside from the mitotic spindle?

    <p>Cilium formation</p> Signup and view all the answers

    What structures are dotted on the endoplasmic reticulum?

    <p>Ribosomes</p> Signup and view all the answers

    What is the function of the cytoskeleton in relation to the transport of substances within the cell?

    <p>To aid in the transport of substances within the cell</p> Signup and view all the answers

    What is the function of cilia?

    <p>To help move substances across the outside of the cell</p> Signup and view all the answers

    What is the diameter of microtubules?

    <p>Not specified</p> Signup and view all the answers

    What is the function of intermediate filaments?

    <p>To provide structural support to the cell</p> Signup and view all the answers

    What is the diameter of intermediate filaments?

    <p>10 nanometers</p> Signup and view all the answers

    What is the function of microfilaments?

    <p>To help move the cell</p> Signup and view all the answers

    What is the diameter of microfilaments?

    <p>7 nanometers</p> Signup and view all the answers

    What is an example of a cell that uses microfilaments to move?

    <p>Amoeba</p> Signup and view all the answers

    What is the function of flagella?

    <p>To help move the cell</p> Signup and view all the answers

    What are all three types of filaments made of?

    <p>Protein</p> Signup and view all the answers

    What is an example of a process that uses microfilaments?

    <p>Cell division</p> Signup and view all the answers

    Study Notes

    Cytoskeleton

    • The cytoskeleton is the skeleton of the cell, providing structural support, movement, and transport of substances within the cell, similar to the purposes of the human skeleton.

    Functions of the Cytoskeleton

    • Provides structural support
    • Helps with movement
    • Helps with the transport of substances within the cell
    • Other functions to be discussed later

    Structures of the Cytoskeleton

    • Microtubules:
      • Have a diameter of approximately 25 nanometers
      • Involved in mitotic spindle, cilia, flagella, and transport of substances within the cell
    • Intermediate Filaments:
      • Have a diameter of approximately 10 nanometers
      • Provide structural support to the cell, resisting mechanical stress and helping the cell retain its shape
      • Can be compared to the metal springs in a mattress
    • Microfilaments:
      • Have a diameter of approximately seven nanometers
      • Involved in movement of the entire cell from within, different from cilia and flagella
      • Examples: cell division, amoeba movement and pseudopods

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    Description

    Learn about the cytoskeleton, its meaning, and its purposes in animal cells. Understand the role it plays in cellular functions.

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