12. FUNCTIONS OF MICROFILAMENT
Microfilaments play a role in
structure, cell motility, and cell
division. Microfilaments are made
of actin, and thus are involved in
muscle contraction as well as cell
division.
13. INTERMEDIATE FILAMENTS
● Made of variety of proteins,
including keratin, desmin and
vimentin
● 8 to 12 nanometer
● Composed of two anti
parallel dimer
19. FUNCTIONS OF INTERMEDIATE FILAMENT
● provide mechanical support for
the plasma membrane where it comes
into contact with other cells or with
the extracellular matrix
● intermediate filaments do not
participate in cell motility.
20. MICROTUBULES
● Microtubules, the thickest fibers, are
hollow rods about 25 microns in
diameter.
● Microtubule fibers are made up of
the globular protein, tubulin, and they
grow or shrink as more tubulin molecules
are added or removed.
25. Microtubules participate in the
intracellular transport of organelles
and vesicles.
FUNCTIONS OF MICROTUBULES
26.
27. Microtubules are the central structural
supports in cilia and flagella.
The locomotive appendages of cell
28. Cilia
● minute hairlike organelles, identical in
structure to flagella, that line the surfaces
of certaincells and beat in rhythmic waves,
providing locomotion to ciliate protozoan a
nd moving liquids along internal epithelial
tissue in animals.