LECTURE 9 (Cytoskeleton, ECM) Flashcards
They walk along cytoskeletal filaments carrying vesicles and other organelles, Bind the filament on one end, bind cargo on the other, and they walk unidirectionally depending on the motor.
Motor Proteins
Three Domains of Motor proteins
- Myosin
- Kinesins
- Dynein
A part of Motor families that walk along Microfilaments
Myosin
A part of Motor Families that walk along Microtubules
Kinesins and Dynein
The main microtubule organizing center of a cell, which organizes the microtubule cytoskeleton.
Centrosome
Nuclear division that produces daughter nuclei that are exact genetic copies of the parental nucleus.
Mitosis
A cylindrical structure consisting of nine triplets of microtubules in the centrosomes of most animal cells.
Centriole
A long cellular appendage specialized for locomotion in some cells. Example: Sperm cells, volvocine algae
Flagellum (plural Flagella)
Short cellular appendages that facilitate locomotion example in paramecium or function to sweep fluid over the surface of the cell.
Cilium (plural Cilia)
Similarities of Both Cilia and Flagella
- Both are surrounded by plasma membrane
- Both are made up of microtubule
Cilia/Flagella movements by Microtubules and Motor Proteins
- Dyneins crosslink and slide microtubules past one another to cause bending
- Totally different mechanism in bacteria
- Uses a rotating socket at the base to turn and create whipping motion
The Prokaryotic Flagellum
Functions of Extracellular Matrix (ECM)
- Support
- Adhesion
- protection
- gateway for in/out and intercellular communication secreted from cells
Mostly cellulose
Plants
Mostly chitin
Fungi
