The Cytoskeleton

Question 1

Name the three types of cytoskeleton fibers.

Answer 1

microfilaments, microtubules, intermediate filaments

Question 2

Microfilaments function

Answer 2

thicken the cortex around the inner edge of a cell; like rubber bands, they resist tension`

Question 3

Microtubules function

Answer 3

thicken the cortex around the inner edge of a cell; like rubber bands, they resist tension

Question 4

Intermediate filaments

Answer 4

are found throughout the cell and hold organelles in place

Question 5

Size and structure of microfilaments

Answer 5

Smallest cytoskeletin
Two protein chains loosely twined together
Movements like contraction, crawling, “pinching”

Question 6

Size and structure of microtubules

Answer 6

Between the size of actin filaments and microtubules

Consists of several intertwined strands of fibrous proteins

Question 7

Size and structure of intermediate filaments

Answer 7

Largest of the cytoskeletal elements
Hollow dimers of α- and β-tubulin subunits
Facilitate movement of cell and materials within cells