Cytoskeleton Movement Do Now Identify the superimportant cell

Cytoskeleton & Movement Do Now: Identify the super-important cell parts that do each of the following functions: 1. Cellular respiration 2. Transports molecules out of the cell 3. CO 2 + H 2 O CH 2 O + O 2 4. Make proteins 5. Stores information about protein structures.

Cytoskeleton

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

• Microfilaments are the smallest strands of the cytoskeleton

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

• Microtubules are larger strands and are thicker and stronger.

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

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

Cell Part: Centrosome & Centrioles • The centrioles (2 per centrosome) are responsible for coordinating the division of chromosomes during eukaryotic cell division.

Centriole Structure: Interesting Biogeometry

Movement • Some cells move using organelles called cilia and flagella

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

• If a cell has cilia, it always has a lot of them

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

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

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

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….

Movement in Animals • What body systems work together to make you move? • How is that similar to the cell systems we just learned about?

Homework • Read