8. Cell Organisation and Communication

Question 1

what is the cytoskeleton? name the functions and how it helps the cell

Answer 1

its a network of fibres that gives support and maintains the cell shape

Question 2

what are the three componenets of the cytoskelelton?

Answer 2

Microtubules

microfillaments

intermediate fillaments

Question 3

what are the three funcitons of microtubules within the cytoskeleton? what are they made of? (macromolecule and type of macromolecule)

Answer 3

cell division (mitosis)

maintain cell shape

organising activities in the cell

microtubules are made of proteins called tubulin, they are hollow.

Question 4

what are microtubules made out of?

hint: its a protein

Answer 4

globular proteins

Question 5

define what microfillaments function is (three points)

hint: think about walking

Answer 5

they maintain the cell shape, muscle contraction and intracelluar movement.

Question 6

what are intermediate fillaments? two points

Answer 6

helps with cell shape

regulates celluar events (transcription & translation)

Question 7

what type of protein are intermediate fillaments made from?

hint: its not actin

Answer 7

keratin!! think of my hair

Question 8

what are the two names of cell signaling? hint: its not a trick question

Answer 8

local signalling and long distance signalling

Question 9

describe what local signalling is

Answer 9

molecules being secreted out of cells by exocytis and DIFFUSED to another cell that is near by

Question 10

describe what long distance signalling is

Answer 10

travel via the circulatory system to another cell