Biology Questions and Answers
Cytoskeleton and
Cell Movement
- What is a cytoskeleton?
What are its main constituents
in animal cells?
Cytoskeleton is the cytoplasmic
structure its shape and fixates athat supports the cell, kend moves thepse cell (^)
organelles. It is made of an extensive
network ocytoplasm anf fibers dispersed in thed anchored in the plasma (^)
membrane. Its components are
microtuintermediate filamebules, micronts.filaments and
- Of which substance are
microtubules made? In which
structures and cellular
processes do microtubules
participate?
Microtudimers obules are made of consecutivef the protein tubulin (each
dimer has an alpha and a beta tubulin
associated). Microtucell division, they are constituentsbules participate in of
cilia and flagella and they also form the
centrioles.
- Of which substance are
microfilaments made? What
are the properties of these
elements that give motility to
cells?
Microfilaments are protein). The contractilemade of actin (a association (^) of
actin with myosin and other cytoplasmic
proteins gability to promote cell movive to microfilaments thement.e
- What are cell movements?
How are these movements
created?
Cell movperformed by cell structures, like ements are movements (^) the
movements of cilia and flagella, thpseudopod movements (in amoeba,e (^)
macrophages, etc.), the cyclosis of the
cytoplasm ancontraction in muscle cd the sarcomerells. e
Cell movcytoskeleton ements can baction, by e created by thedifferences of
viscosity among cytoplasmic regions
and by intracellular contraction systems.
- What are cilia and flagella?
How do these structures
acquire movement? What are
some examples of ciliated and
flagellated cells in humans?
Cilia ansome prokaryotes as well id flagella are structures fn someound in
eukaryoticnutrition an cells. They play dd movement roles for theefense, (^)
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