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L8 The Cytoskeleton, ECM, and Cellular Junctions (Cell Shape Regulation)

Mer Scott 11 Fragen 5,0 (1 Bewertung)

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  1. 1Which statement about the cytoskeleton is INCORRECT?
    1. AThe cytoskeleton is a static structure.
    2. BThe cytoskeleton helps maintain cell shape.
    3. CThe cytoskeleton maintains organelles position.
    4. DThe cytoskeleton is important for the movement of vesicles.
  2. 2The cytoskeleton is highly [blank_start]dynamic[blank_end], but still provides [blank_start]stability[blank_end].
    1. Adynamic
    2. Breactive
    3. Cstability
    4. Dsome structure
  3. 3There are four components of the cytoskeleton: microtubules, microfilaments, intermediate filaments, and terminal ends.
    1. ARichtig
    2. BFalsch
  4. 4Choose the INCORRECT statement about the cytoskeleton's components.
    1. AMicrotubules are the smallest filaments in the cytoskeleton.
    2. BMicrofilaments are made up of a double chain of actin.
    3. CMicrofilaments resist tension and are distributed in the outer cytoplasm (cortex).
    4. DIntermediate filaments are usually made of keratin, which is supercoiled into cables.
    5. EIntermediate filaments build the nuclear lamina, and anchor organelles.
  5. 5Microtubules resist [blank_start]compression[blank_end], while microfilaments resist [blank_start]tension[blank_end].
    1. Acompression
    2. Btension
  6. 6Choose the CORRECT statements about microtubules.
    1. AMicrotubules can make up flagella and cilia, allowing whole cell movements or movement of external fluid.
    2. BMicrotubules often originate from the peroxisome.
    3. CMotor proteins travel along microtubules.
    4. DMicrotubules are composed of α-tubulin and β-tubulin.
    5. EMicrotubules are the most stable of the filaments.
  7. 7Microfilaments are the only filaments in the cytoskeleton that form 3D networks with proteins.
    1. ARichtig
    2. BFalsch
  8. 8Choose the statement about cell junctions which is CORRECT.
    1. ATight junctions form a continuous seal which prevents fluid loss.
    2. BDesmosomes provide pores between cells to transport ions and communicate via (a cytoplasmic connection.)
    3. CGap junctions anchor adjacent cells, acting like a rivet.
    4. DMuscle cells have few desmosomes.
  9. 9Which statement about collagen in the ECM is NOT correct?
    1. ACollagen makes up about 50% of total body protein.
    2. BCollagen resists compression.
    3. CCollagen is 'turned over', or, recycled.
    4. DCollagen is a glycoprotein secreted by fibroblasts.
  10. 10The base of the ECM is proteoglycan—an extensively sugared protein.
    1. ARichtig
    2. BFalsch

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Beschreibung
Objectives: Identify the major components of the cytoskeleton Explain how these structures regulate cell shape Describe the composition and origin of the ECM Outline the importance of cell junctions
Sprache
English
Aufrufe
106
Bewertung
5,0 von 5 · 1 Bewertung
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