8288153
Descrição
Questão 1
Questão
Which statement about the cytoskeleton is INCORRECT?
Responda
-
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.
Questão 2
Questão
The cytoskeleton is highly [blank_start]dynamic[blank_end], but still provides [blank_start]stability[blank_end].
Responda
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dynamic
-
reactive
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stability
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some structure
Questão 3
Questão
There are four components of the cytoskeleton: microtubules, microfilaments, intermediate filaments, and terminal ends.
Responda
- True
- False
Questão 4
Questão
Choose the INCORRECT statement about the cytoskeleton's components.
Responda
-
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.
Questão 5
Questão
Microtubules resist [blank_start]compression[blank_end], while microfilaments resist [blank_start]tension[blank_end].
Responda
-
compression
-
tension
Questão 6
Questão
Choose the CORRECT statements about microtubules.
Responda
-
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.
Questão 7
Questão
Microfilaments are the only filaments in the cytoskeleton that form 3D networks with proteins.
Responda
- True
- False
Questão 8
Questão
Choose the statement about cell junctions which is CORRECT.
Responda
-
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.
Questão 9
Questão
Which statement about collagen in the ECM is NOT correct?
Responda
-
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.
Questão 10
Questão
The base of the ECM is proteoglycan—an extensively sugared protein.
Responda
- True
- False
Questão 11
Questão
Proteoglycan in the ECM resists tension and traps water.
Responda
- True
- False
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