MICROTUBULESBy: Nathan Piluso

Pd. 5

Definition

Microtubules are one of the many components that make up the cytoskeleton of a cell. They are hollow tubes made up of protein called tubulin.

Sometimes they are considered the conveyer belts of a cell.

Function

One of the main function of the microtubules is to guide organelles and molecules throughout the cell. But this is not their only job. They are also responsible for maintaining a cell’s shape.

Microtubules are important in helping cell division and supporting the cytoplasm. Once a cell divides, the microtubules are put to work in other areas.

Model of a Microtubule

Explanation of Structure

As seen in the model on the previous slide, a microtubule consists of many forms of the protein tubulin that stack up in a tube shape. These tubulin form subunits within the microtubule and allow it to do its job efficiently.

Location

For the most part, microtubules can be found within a cell’s cytoplasm for support, but there are certain stable microtubules that are located in a cell’s cilia and flagella.

Cilia and flagella are actually made up of microtubules and help them do

their job.

Oh, I see…

References

http://www.cytochemistry.net/Cell-biology/microtub.htm#tubulin

http://www.biology4kids.com/files/cell_microtubule.html