extracellular matrix and cytoskeleton

Question 1

function of all cytoskeletal components?

Answer 1

cell shape

Question 2

microtubules

Answer 2

• big
• tubulin dimer polymers
• -synaptic vesicle transport, cell division, cilia

Question 3

intermediate filaments

Answer 3

• misc proteins eg. keratin

- holding organelles in place, nuclear lamina

Question 4

microfilaments

Answer 4

• small
• actin
• with the help of myosin - muscle movement, cytokinesis, cytoplasmic streaming

Question 5

components of plant cell ecm?

Answer 5

primary cell wall - cellulose
secondary cell wall - ligament
plasmodesmata

Question 6

components of animal ecm?

Answer 6

fibronectin (joins cells)
collagen
proteoglycan complex
integrins
cell junctions

Question 7

describe cell junctions

Answer 7

• gap junctions (protein crossing 2 membranes)
• tight junctions (protein holding together 2 membranes)
• desmosomes (keratin proteins linking cells)