cytoskeleton Flashcards
what is the function and structure of microfilaments
structure: Actin filbers bound together.
linnear or 3d network (formed with branching proteins)
Function: good at resisting tention
Can be used by myosin subunits to contract cell
Reduces cytosol in the cortical area to maintain cell shape
What are the three mian componets of the cytoskeleton
Micro filaments
micro tubules
intermediate filaments
what is the function and structure of intermediate filaments
structure: super coiled proteins
hair=keratin, nerves=nurofilament, nucleus=lamins
hard to deconstruct
Functions: hold organels in place
great under tention
makes semi perminent cell shapes
stays past cell death
what is the function and structure of micro tubules
structure: tublin subunits forming a cylender
functions: good under compression
used for motor proteins to transport organells across cell
cila/ flagella = move the cell
what does a tight junction do
binds adjacent cells forming a fluid resticting barrier, tighter the junction the less particals travel through
what do desmosomes do
anchor cells together forming a semiperminent bond between the intermediate filament in the cytoskeleton of each cell
what do gap junctions do
connect the cytosol of two cells enabling fast signaling between cells as ions and small molecules can pass quickly between
this enables rapid cell communications
what are the two parts of the ECM
proteoglycan surounding glycoproteins collogen,
collogen resists tenetion
porteoglycans sidechain sugars trap water to resist compresson
made from
how is the cytoskeleton connected to the outside of the cell
cell membran proteins intergrals connect to fibronectins which connect to the ECM
