Cytoskeleton Componenys Flashcards
How are microtubules and microfilaments dynamic?
They can add or subtract units to each of their ends
Name the three types of filaments and their subunits
Microtubule- tubules
Microfiliments- actin in a double strand
Intermediate filaments- intermediates filament such as keratin
What is the function of the micro tubule movement protein?
They stay in one place and cause change by making each tubule move against another
How do microfilaments move with a protein?
The protein causes the filament to either contract or crawl:
Contraction: protein pulls the filaments together
Crawling: subunits are added and subtracted in the direction of movement, causing the entire cell to move
What are adheres junctions
They use cadhedins proteins to bridge cells extracellulary and intracellulary. Attached to microfilaments and allow contraction and respond
What are tight junctions
They seal extracellular space
What are gap junctions?
They create a funnel to allow free flow of ions between cells. Allows for coordination and response
What are demsosomes
They hold adjacent cells together
What are hemidesmosomes?
Anchor epithelial cells together and to the extra cellular matrix.
