Cytoskeleton

Definition

The cytoskeleton is a network of protein filaments and tubules that provides structure, shape, and movement to the cell. It plays crucial roles in intracellular transport and cellular division.

5 Must Know Facts For Your Next Test

1. The cytoskeleton consists of three main components: microfilaments, intermediate filaments, and microtubules.
2. Microfilaments are composed of actin and are involved in cell movement and muscle contraction.
3. Intermediate filaments provide mechanical support for the cell and help maintain its shape.
4. Microtubules are made of tubulin and are essential for cell division, forming the mitotic spindle.
5. The cytoskeleton is dynamic, constantly reorganizing itself in response to cellular needs.

Review Questions

• What are the three main components of the cytoskeleton?
• How do microfilaments contribute to cellular movement?
• What role do microtubules play during cell division?

Related terms

Microfilaments:

Thin protein fibers composed of actin that facilitate cellular movement.

Intermediate Filaments: Fibrous proteins that provide structural support and maintain cell shape.

Microtubules:

Hollow tubes made of tubulin that assist in cell division and intracellular transport.