Be Humbled by the Truth Cytoskeleton
Genesis • There are three types of filaments that create and support the innings of a cell • Microtubules • Actin Filaments • Intermediate Filaments • …But wait, there’s more!!!
Microtubules • Microtubules of a cytoskeleton are straight hollow cylinders made up of tubulin monomers. microtubule
The microtubules are the support of the cytoskeleton and also help in the transport of certain protein molecules
Actin Filaments • AKA microfilaments. • The finest of the three • Forms a band just beneath the plasma membrane
Generates locomotion in cells • Ex: white blood cells This is what you should be looking at
ALSO, they interact with myosin filaments to provide the force of muscular contractions… …Whoa!!
Intermediate Filaments • Several Types: • Keratins • Nuclear Lamina • Neurofilaments • Vimentins • They provide a supporting framework within the cell
Roles of Cytoskeleton • Maintains cell shape • Protects the cell • Enables some cell motion (using structures such as flagella and cilia) • Plays important roles in intra-cellular transport (the movement of vesicles and organelles) • Plays important role in eukaryotic cellular division
Remember! The cytoskeleton is both a muscle and a skeleton, and is responsible for: • Cell movement • Cytokinesis • Organization of the organelles within cell • The cytoskeleton acts as a "track" on which cells can move organelles, chromosomes and other things.
Motility • Spontaneous Motion • Product of evolution • The cytoskeleton is very critical to cell motility • The cytoskeleton system is a secondary source for cell motility
Bringing It All Together • http://www.wiley.com/college/pratt/0471393878/student/animations/actin_myosin/actin_myosin.sw
The End… …or is it? • Get your pencils out because we have a miniscule POP QUIZ to give you!!!!