2.1 Cytoskeleton Flashcards
What are protein threads arranged as?
- microfilments
* microtubules
What are microfilments?
Small solid strands
What are microtubules?
Tiny protein cylinders
What are the functions of the cytoskeleton?
- support the cells organelles
- strengthens the cell and maintains its shape
- responsible for movement of materials inside the cell
- movement if the cell
Give an example of the movement inside the cell?
Movement of chromosomes when they separate during cell division
What is the cytoplasm made up of?
A network of protein threads called the cytoskeleton
Where are actin filaments found?
In muscle cells
What do actin filaments help to do?
- Move organelles in the cell
- cause movement in white blood cells
How big are microtubules?
25nm in diameter
What are microtubules made of?
A protein called tubulin
What do microtubules do?
- move microorganisms through liquid
- move liquid
- move organelles in cells
What do microtubules use to drive movement?
ATP
What is the cytoskeleton made up of?
Microfilments
Intermediate filaments
Microtubules
What is the cytoskeleton?
A complex network of fibres that resist tension to support and maintain the cells shape
What is the same about the elements that make up the cytoskeleton?
They are all dynamic
Why do the elements that make up the cytoskeleton move?
To move material inside the cell
To alter the shape of the cell
To move the cell itself
What do microfilaments do?
Maintaining cell shape
Muscle contraction
Cytokinesis of cell division
What do intermediate filaments do?
Maintain cell shape
Anchor the nucleus and organelles
