8288153
Descripción
Pregunta 1
Pregunta
Which statement about the cytoskeleton is INCORRECT?
Respuesta
-
The cytoskeleton is a static structure.
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The cytoskeleton helps maintain cell shape.
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The cytoskeleton maintains organelles position.
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The cytoskeleton is important for the movement of vesicles.
Pregunta 2
Pregunta
The cytoskeleton is highly [blank_start]dynamic[blank_end], but still provides [blank_start]stability[blank_end].
Respuesta
-
dynamic
-
reactive
-
stability
-
some structure
Pregunta 3
Pregunta
There are four components of the cytoskeleton: microtubules, microfilaments, intermediate filaments, and terminal ends.
Respuesta
- True
- False
Pregunta 4
Pregunta
Choose the INCORRECT statement about the cytoskeleton's components.
Respuesta
-
Microtubules are the smallest filaments in the cytoskeleton.
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Microfilaments are made up of a double chain of actin.
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Microfilaments resist tension and are distributed in the outer cytoplasm (cortex).
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Intermediate filaments are usually made of keratin, which is supercoiled into cables.
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Intermediate filaments build the nuclear lamina, and anchor organelles.
Pregunta 5
Pregunta
Microtubules resist [blank_start]compression[blank_end], while microfilaments resist [blank_start]tension[blank_end].
Respuesta
-
compression
-
tension
Pregunta 6
Pregunta
Choose the CORRECT statements about microtubules.
Respuesta
-
Microtubules can make up flagella and cilia, allowing whole cell movements or movement of external fluid.
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Microtubules often originate from the peroxisome.
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Motor proteins travel along microtubules.
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Microtubules are composed of α-tubulin and β-tubulin.
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Microtubules are the most stable of the filaments.
Pregunta 7
Pregunta
Microfilaments are the only filaments in the cytoskeleton that form 3D networks with proteins.
Respuesta
- True
- False
Pregunta 8
Pregunta
Choose the statement about cell junctions which is CORRECT.
Respuesta
-
Tight junctions form a continuous seal which prevents fluid loss.
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Desmosomes provide pores between cells to transport ions and communicate via (a cytoplasmic connection.)
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Gap junctions anchor adjacent cells, acting like a rivet.
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Muscle cells have few desmosomes.
Pregunta 9
Pregunta
Which statement about collagen in the ECM is NOT correct?
Respuesta
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Collagen makes up about 50% of total body protein.
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Collagen resists compression.
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Collagen is 'turned over', or, recycled.
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Collagen is a glycoprotein secreted by fibroblasts.
Pregunta 10
Pregunta
The base of the ECM is proteoglycan—an extensively sugared protein.
Respuesta
- True
- False
Pregunta 11
Pregunta
Proteoglycan in the ECM resists tension and traps water.
Respuesta
- True
- False
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