Bio final exam Kaplan slides 2 (LO 2) Flashcards
3 components of eukaryotic cytoskeleton
-Microfilament
-Intermediate filaments
-Microtubules
Monomer
-Proteins
Microfilaments
-Movement (whole cell or internal parts)
-Determine and stabilize shape
-Made from actin monomers
-Polymers
Motor protein
-Proteins that cause movement in a cell
-Uses ATP
-Goes through reversible shape changes
-Walk along microfilaments and cause movements
Dynamic instability
-Disassemble and reform quickly
-Actin associated proteins
-Equilibrium: no net growth of filament
Intermediate filaments
-Diff monomers make up diff filaments
-Stable
-Anchor cell structures in place
-Resist tension (helps cell stay strong)
Microtubules structure
-Assembled from chains of tubular dimers
- 2 diff monomers (13 rows of these)
-Hollow
-Dynamic stability (+ and - ends)
Microtubules function
-Form rigid internal skeleton
-Help move things
-Centrioles
-Eukaryotic cilia and flagella
-Some cells: mobility
Movement of vesicles and organelles
-Kinesin: towards + end
-Dynein: towards - end
Cilia and flagella movement
-Dynein driven
-Nexin = bending
-No nexin = sliding
Animals have
-Extracellular matrix
Extracellular matrix
-Collagen protein (fibrous component)
-Proteoglycans
-Proteins that link them together
Proteoglycans
-Proteins with long carbohydrate chains, gel like medium
How is the cell membrane and EM connected
-Specific proteins
-2 binding sites: interior of cell (microfilaments), and collagen
-Reversible binding
EM functions
-Holds cell together in tissues
-Communication
-Filtering
-Orientate movements
