Examples of Cytoskeleton
The cytoskeleton is a network of protein filaments and tubules that maintains the shape of a eukaryotic cell, organizes its contents, and enables it to move. There are three main types of cytoskeletal filaments:
Microtubules: Hollow, cylindrical structures made of tubulin protein; responsible for cell shape, division, and transport of organelles.
Microfilaments: Also known as actin filaments; thin, solid structures made of actin protein; involved in cell movement, phagocytosis, and muscle contraction.
Intermediate filaments: Thicker, more flexible fibers made of various proteins; provide structural support and protect the cell from mechanical stress.
Examples of Cytoskeleton
- Cilia and flagella: Hair-like structures made of microtubules; responsible for cell movement and fluid propulsion.
- Centrosomes: Organelles that contain microtubule organizing centers; important for cell division and migration.
- Spindle fibers: Microtubules that form during cell division; separate chromosomes during mitosis and meiosis.
- Stress fibers: Microfilaments that form in response to mechanical stress; provide structural support and maintain cell shape.
- Vimentin: An intermediate filament that provides mechanical strength to tissues such as connective tissue and the cytoplasm.
Related Questions and Answers
- What is the function of microtubules? Maintaining cell shape, division, and organelle transport
- What are microfilaments involved in? Cell movement, phagocytosis, and muscle contraction
- What type of cytoskeletal filament provides structural support and protects the cell from stress? Intermediate filaments
- What organelles contain microtubule organizing centers? Centrosomes
- What are two examples of structures made from microtubules? Cilia and flagella
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