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) !!!
!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) !!!!!!