Cytoskeleton

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What is cytoskeleton? What is its function?

A cytoskeleton is a network of protein fibers found in all eukaryotic cells. Their function is to help support the shape of the cell, maintains organelles in fixed locations and helps move materials within the cell.

Describe actin filaments. What major roles do they play in the cell?

Actin filaments are thread like protein fibers that are responsible for cellular movements such as contractions, crawling, helps with cytokinesis and maintain cell shape. They are about 7nm in diameter and are made of actin protein subunits.

Describe microtubules filaments. What major roles do they play in the cell?

Describe intermediate filaments. What major roles do they play in the cell?

Which parts of the cell are responsible for cell movement? Explain

The cilia and the flagella are responsible for the movement of cells. The cilia are tiny hair-like structures that help in "crawling" and are found in the epithelial linning of respiratory or beat in synchrony causing the movement of unicellular paramecium. Flagella are whip-like appendages that aid in cell movement for example SPERM. Both cilia and flagella have a nine two structure with nine pairs of microtubules on the outside and two microtubules on the inside.

Describe the internal structure of a flagella. Is it similar to that of cilia?

How do integrins play a role in cell communication?

How do cadherins play a role in cell adhesion?

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