Podcast
Questions and Answers
Which of the following is a component of the cytoskeleton?
Which of the following is a component of the cytoskeleton?
Which is NOT a feature of actin filaments?
Which is NOT a feature of actin filaments?
The trigger to initiate the contractile process in skeletal muscle is:
The trigger to initiate the contractile process in skeletal muscle is:
Cytoskeletal filaments that display "dynamic instability:”
Cytoskeletal filaments that display "dynamic instability:”
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During contraction of a sarcomere:
During contraction of a sarcomere:
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All of the following statements are true of microtubules and actin filaments, EXCEPT:
All of the following statements are true of microtubules and actin filaments, EXCEPT:
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__________made of fibrous proteins under the Keratin family
__________made of fibrous proteins under the Keratin family
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The ciliary action of the cells lining the lumen of fallopian tube are responsible for transporting an egg from the ovaries to the
uterus. Which cytoskeleton structures are linked to this movement?
The ciliary action of the cells lining the lumen of fallopian tube are responsible for transporting an egg from the ovaries to the uterus. Which cytoskeleton structures are linked to this movement?
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Which cytoskeletal structure is linked with the movements of a macrophage?
Which cytoskeletal structure is linked with the movements of a macrophage?
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Dynein and Kinesin:
Dynein and Kinesin:
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DNA replicates during ___________.
DNA replicates during ___________.
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What is the next stage after TELOPHASE in the cell cycle?
What is the next stage after TELOPHASE in the cell cycle?
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What would be the most obvious outcome of repeated cell cycles consisting of S phase and M phase only?
What would be the most obvious outcome of repeated cell cycles consisting of S phase and M phase only?
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Which one of the following statements best describes the mechanism by which the "cell cycle control system" regulates events
of the cell cycle?
Which one of the following statements best describes the mechanism by which the "cell cycle control system" regulates events of the cell cycle?
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Apoptosis involves all of the following events, EXCEPT:
Apoptosis involves all of the following events, EXCEPT:
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Which of the following groups of proteins associate with kinases and are synthesized and degraded at specific points during the
cell cycle?
Which of the following groups of proteins associate with kinases and are synthesized and degraded at specific points during the cell cycle?
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The contractile ring formed during animal cell division is formed of:
The contractile ring formed during animal cell division is formed of:
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Ions can travel directly from the cytoplasm of one animal cell to the cytoplasm of an adjacent cell through
Ions can travel directly from the cytoplasm of one animal cell to the cytoplasm of an adjacent cell through
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A cell can crawl through a tissue because of the transmembrane ______________ proteins that can bind to fibronectin outside of
the cell.
A cell can crawl through a tissue because of the transmembrane ______________ proteins that can bind to fibronectin outside of the cell.
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What is the word that describes uncontrollable cell proliferation forming malignant tumors that can result in the invasion of
surrounding healthy tissues?
What is the word that describes uncontrollable cell proliferation forming malignant tumors that can result in the invasion of surrounding healthy tissues?
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The life span of human nerve cells is approximately
The life span of human nerve cells is approximately
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What is the most important property of a cancer cell, whether it is in the body or the culture dish?
What is the most important property of a cancer cell, whether it is in the body or the culture dish?
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Cell-cell anchoring junctions with intermediate filaments are called?
Cell-cell anchoring junctions with intermediate filaments are called?
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Which of the following is considered to be a fibrous protein?
Which of the following is considered to be a fibrous protein?
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Microtubules are made of?
Microtubules are made of?
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Spindle fibers are made up of which type of components?
Spindle fibers are made up of which type of components?
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The trigger to initiate the contractile process in skeletal muscle is:
The trigger to initiate the contractile process in skeletal muscle is:
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Which of the following statements are true regarding actin?
Which of the following statements are true regarding actin?
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Which of the following participate in the formation vesicle?
Which of the following participate in the formation vesicle?
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The life span of human small intestine epithelial cells is approximately:
The life span of human small intestine epithelial cells is approximately:
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Cells that are terminally differentiated__________
Cells that are terminally differentiated__________
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Which one of the following statments best describe the mechanism by the cell cycle control system regulates events of the cell cycle?
Which one of the following statments best describe the mechanism by the cell cycle control system regulates events of the cell cycle?
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Which of the following statements is incorrect about the G0 phase?
Which of the following statements is incorrect about the G0 phase?
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Apoptosis plays an important role in normal human growth. How is apoptosis involved in normal embryological development?
Apoptosis plays an important role in normal human growth. How is apoptosis involved in normal embryological development?
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Identify two stages of the mitotic phase
Identify two stages of the mitotic phase
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There are two main processes in the M (mitotic) phase. Which process occurs last?
There are two main processes in the M (mitotic) phase. Which process occurs last?
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What is the next stage after TELEPHASE in the cell cycle?
What is the next stage after TELEPHASE in the cell cycle?
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Which of the following are external regulators (proteins) of the cell cycle?
Which of the following are external regulators (proteins) of the cell cycle?
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Identify two of the mitotic phases.
Identify two of the mitotic phases.
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Cell-basal lamina anchoring junctions with intermediate filaments are called?
Cell-basal lamina anchoring junctions with intermediate filaments are called?
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What is the most important property of a cancer cell, whether it is in the body or the culture dish?
What is the most important property of a cancer cell, whether it is in the body or the culture dish?
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Proteoglycans in the extracellular matrix of animal tissues_________
Proteoglycans in the extracellular matrix of animal tissues_________
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Adherens junctions play an important role in development; they are composed of:
Adherens junctions play an important role in development; they are composed of:
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Which of the following statements about desmosomes is true?
Which of the following statements about desmosomes is true?
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Study Notes
Cytoskeleton Components and Functions
- Cytoskeleton includes microtubules, actin filaments, and intermediate filaments.
- Actin filaments are not characterized by dynamic instability; they are typically stable.
- Contractile process in skeletal muscle is initiated by calcium ion release from the sarcoplasmic reticulum.
- Cilia in fallopian tube are made of microtubules, facilitating egg transport.
- Macrophage movement involves actin filaments.
- Dynein and Kinesin are motor proteins that transport cellular materials along microtubules.
Cell Cycle and Apoptosis
- DNA replicates during the S phase of the cell cycle.
- After telophase, the next phase is cytokinesis.
- Repeating S and M phases without G1 or G2 phases leads to increased cell numbers without growth.
- The cell cycle control system regulates events through checkpoints and cyclins.
- Apoptosis includes DNA fragmentation but does not include inflammation; it’s a programmed cell death process.
Proteins and Junctions
- Cyclins are proteins that associate with kinases and regulate the cell cycle.
- The contractile ring during animal cell division is made of actin filaments and myosin.
- Ions travel between animal cells through gap junctions, allowing intercellular communication.
- Transmembrane integrin proteins enable cells to migrate by binding to fibronectin in the extracellular matrix.
- Cancer is characterized by uncontrollable cell proliferation and the potential for invasion of surrounding tissues.
Lifespan and Differentiation of Cells
- Human nerve cells can live for many years, often until the organism dies.
- Cancer cells exhibit properties such as rapid division and loss of differentiation.
- Cell-cell anchoring junctions associated with intermediate filaments are called desmosomes.
- Microtubules are constructed from tubulin dimers, their dynamic structures serve various cellular functions.
Junctions and ECM Components
- Spindle fibers are primarily made up of microtubules.
- Terminally differentiated cells have exited the cell cycle and no longer divide.
- Desmosomes provide mechanical strength and stability at cell-cell junctions.
- Proteoglycans in the extracellular matrix assist with cell signaling and structural support.
- Adherens junctions, important in tissue development, are composed of cadherin proteins linked to actin filaments.
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Description
Test your knowledge on the various components of the cytoskeleton. This quiz will challenge your understanding of cytoskeletal structures and their functions in biological systems. Get ready to explore the essential parts that support cellular integrity.
