Podcast
Questions and Answers
What is the function of microvilli?
What is the function of microvilli?
How do cilia and flagella function?
How do cilia and flagella function?
What are stereocilia?
What are stereocilia?
Unusual microvilli that are unrelated to cilia.
Microvilli are covered by extensions of the ________.
Microvilli are covered by extensions of the ________.
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Microvilli have bundles of thin __________ in their cores.
Microvilli have bundles of thin __________ in their cores.
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What does the 'terminal web' do?
What does the 'terminal web' do?
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Fluid-absorbing cells in the male reproductive tract have __________ specializations called stereocilia.
Fluid-absorbing cells in the male reproductive tract have __________ specializations called stereocilia.
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Where is cilia found?
Where is cilia found?
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Cilia contain a core of _________.
Cilia contain a core of _________.
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________ have pairs of centrioles at their core.
________ have pairs of centrioles at their core.
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The microtubules in the core of the __________ are arranged in a '(9+2)' configuration.
The microtubules in the core of the __________ are arranged in a '(9+2)' configuration.
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The cilium's core is called an _______.
The cilium's core is called an _______.
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List three differences between cilia and microvilli.
List three differences between cilia and microvilli.
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Study Notes
Microvilli Function
- Microvilli enhance cell surface area, crucial for absorption and transport processes.
- Commonly found on epithelial cells lining intestines, aiding in nutrient absorption.
Cilia and Flagella Function
- Cilia and flagella actively beat to move material across surfaces or through tubes.
Stereocilia
- Stereocilia are unique structures resembling microvilli but are unrelated to cilia.
- They consist of elongated, branched microvilli, which serve to increase the cell's surface area.
Structure of Microvilli
- Microvilli are encased by extensions of the plasma membrane.
- The structure contains bundles of actin filaments that stiffen and maintain their extended form.
Terminal Web
- The terminal web anchors microvillar filaments to the apical cytoplasm of cells.
- It comprises intermediate filaments, providing structural support.
Stereocilia Location
- Found in fluid-absorbing cells within the male reproductive tract.
- Act as specializations with typical actin cores to enhance surface area.
Cilia Location
- Present on cells that transport materials through tubes or across surfaces.
- Notably motile and located on epithelial cells in trachea, oviduct, and brain ventricles.
- Flagella, similar to cilia in structure and function, are located on spermatozoa.
Structure of Cilia
- Cilia are larger than microvilli, containing a core structure composed of microtubules.
Basal Bodies
- Basal bodies feature pairs of centrioles that anchor and stabilize microtubules, preventing depolymerization.
Configuration of Microtubules
- The core microtubules in cilia and flagella exhibit a "(9+2)" arrangement, indicating nine outer doublet microtubules surrounding two central microtubules.
Axoneme
- The core structure of a cilium is termed the axoneme, integral to its function.
Cilia vs. Microvilli
- Cilia are motile, whereas microvilli lack motion.
- Cilia are structurally supported by microtubules; microvilli utilize actin filaments.
- Cilia are generally wider and taller than microvilli.
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Description
Explore the critical functions of cilia and microvilli in cellular biology through this quiz. Learn how these structures enhance cell surface area and facilitate movement across membranes. Perfect for students studying cell structure and function.
