cell membrane and transport assignment

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Science 10 Assignment (40 marks) 1. Explain the four points of the particle model of matter (4 marks) 2. Explain how the process of diffusion, facilitated diffusion, and active transport occur and why each one is important to the cell. (6 marks) 3. Using your own words, explain what is meant by the terms “concentration gradient” and “equilibrium” (2 marks) 4. Explain how you would ensure that the celery you bought three days ago will be crisp and fresh for your dinner tonight. (1 mark) 5. What are the differences between passive and active transport ? (2 marks) 6. Draw (or obtain a diagram from the internet) two diagrams showing the processes of endocytosis and exocytosis. Indicate the similarities and differences. (6 marks) 7. The transport of wastes out of the blood during dialysis depends on the composition of the dialysis solution. Explain this statement. You should include the particle model of diffusion and the role of the cell membrane in your answer. (4 marks) 8. Draw and label (or obtain from the internet) a diagram of a liposome. how are liposomes used in the treatment of HIV and cancer patients ? (3 marks)

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Page 1: Cell Membrane and Transport Assignment

Science  10  Assignment    (40  marks)  !

1. Explain  the  four  points  of  the  particle  model  of  matter  (4  marks)  !!!2. Explain  how  the  process  of  diffusion,  facilitated  diffusion,  and  active  

transport  occur  and  why  each  one  is  important  to  the  cell.  (6  marks)  !!!!!3. Using  your  own  words,  explain  what  is  meant  by  the  terms  “concentration  

gradient”  and  “equilibrium”  (2  marks)  !!!4. Explain  how  you  would  ensure  that  the  celery  you  bought  three  days  ago  will  

be  crisp  and  fresh  for  your  dinner  tonight.    (1  mark)  !!!5. What  are  the  differences  between  passive  and  active  transport  ?  (2  marks)  !!!6. Draw  (or  obtain  a  diagram  from  the  internet)  two  diagrams  showing  the  

processes  of  endocytosis  and  exocytosis.    Indicate  the  similarities  and  differences.    (6  marks)  !!!

7. The  transport  of  wastes  out  of  the  blood  during    dialysis  depends  on  the  composition  of  the  dialysis  solution.    Explain  this  statement.    You  should  include  the  particle  model  of  diffusion  and  the  role  of  the  cell  membrane  in  your  answer.  (4  marks)  !!!

8. Draw  and  label  (or  obtain  from  the  internet)  a  diagram  of  a  liposome.    how  are  liposomes  used  in  the  treatment  of  HIV  and  cancer  patients  ?    (3  marks)  !!!

Page 2: Cell Membrane and Transport Assignment

!9. Describe  the  role  of  membrane  technologies  in  the  following  :  (3  marks)  

a) water  puriTication  !b) peritoneal  dialysis  ! !c) gene  therapy  for  cancer.  !!!

10. List  three  differences  between  peritoneal  dialysis  and  hemodialysis  (3  marks)  !!!!

11. Explain  the  term  “reverse  osmosis”  as  compared  with  “osmosis”  (2  marks)  !!!12. Explain  the  importance  of  membrane  binding  to  the  action  of  insulin.  (1  

mark)  !!!13. Describe  some  of  the  limitations  of  membrane  technologies  in  the  treatment  

of  HIV,  diabetes,  cancer  and  kidney  disease.  (4  marks)  !!!!!!