Final: Chapter 17

Question 1

cytoskeleton

Answer 1

• intricate network of protein filaments that extends throughout the cytoplasm
• supports the large volume of cytoplasm(important in animals w/o cell walls)
• crawling of cells along a surface, the contraction of muscle cells, and the changes in cell shape that take place as an embryo develops
• controls the location of the organelles and provides the machinery for transport between them
• responsible for the segregation of chromosomes into two daughter cells at cell division and for pinching apart those two new cells

Question 2

cytoskeleton structure

Answer 2

• intermediate filaments(family of fibrous filaments forms), microtubules(globular tubulin forms), and actin filaments(globular actin filaments form)
  
  • each has distinct mechanical properties and is formed from a diff protein subunit