1. Cytoskeleton & Movement Do Now: 1.Turn in Homework, get out notes from Friday (cytoskeleton) 2.Cell City analogies: If you havent done so, add ribosomes to the ER row, because it should be Endoplasmic reticulum + ribosomes. Finish any anaolgies you haven’t completed yet.

2. Cell City Presentations Your project should include: –Analogy reasoning for each part –A representation of each part that makes sense Due Monday: 1 week. Don’t waste time!

3. Cytoskeleton

4. Just like your body has a skeleton to maintain its shape and size, cells have a cytoskeleton to do the same thing.

5. Microfilaments are the smallest strands of the cytoskeleton

6. Microfilaments are a polymer of a protein called actin. They’re used for cell movement and muscle contraction

7. Microtubules are larger strands and are thicker and stronger.

8. Microtubules are hollow tubes made of a protein called tubulin.

9. During cell division, spindle fibers move chromosomes apart. Spindle fibers are microtubules.

10. Movement Some cells move using organelles called cilia and flagella

11. Cilia are small hair-like structures on the outside of a cell.

12. If a cell has cilia, it always has a lot of them!

13. Cilia (and flagella) are made of microtubules bundled together.

14. Flagella are much bigger than cilia, and cells that have them only have a few.

15. One More Way to Move: Pseudopodia Means “false foot” Think blob

16. How do cells move? Cilia: many tiny beating “hairs.” Flagella: a few long, whip-like propellers. Pseudopodia: flow from 1 spot to another. Do The Dance….