lecture 3- cytoskeleton

Question 1

the cell shape

Answer 1

•dynamic •maintains cell shape •protects cell •enables cellular motion (Cilla and flagella) •intracellular transport

Question 2

actin

Answer 2

resistance to snapping •most conc below cell membrane •2 intertwined chains •signal transduction •g actin active filament •muscular contraction •cytoplasmic streaming

Question 3

cytoplasmic streaming

Answer 3

organisation of cytoplasm

Question 4

intermediate filaments

Answer 4

•more stable •heterogeneous •deeper in the cell •thicker •anchors organelles •cell-cell or cell-matrix junction

Question 5

microtubules

Answer 5

•alpha and beta tubulin •v dynamic •constantly elongating and shortening •form a ring around nucleus •resist compression •imperfect helix •synthesis of the cell wall in plants •mitrocondrial spindles

Question 6

centrioles

Answer 6

•star shaped •organising the mitotic spindle •organise the organelle

Question 7

microtubules shape

Answer 7

star shaped •9 doublets 2 additional microtubules