Thursday, April 1, 2010

Specialised Cells Research - Group 4 (Red Blood Cells)


Assignment:


1. Students (in groups) to research on one of the following cells (e.g., root hair cell, green leaf cell, human muscle cell and human red blood cell).


2. Each student is to reflect the Learning Points of the other cell type (e.g., red blood cell group to reflect on root hair cell group). Please input your Learning Points in the comments by tonight, 2359.

Area of focus:

a. What are the organelles found in the cell?

b. List the structural features of the cell.

c. What are the functions of these organelles?

d. Why are these functions of the organelles important to the living cell?



a. What are the organelles found in the cell?

-Plasma membrane

-Network of supporting cytoskeleton


b. List the structural features of the cell.

-It is biconcave in shape(a dimple is present on both sides of the cell )

increases surface area

-The cytoplasm contains haemoglobin


c. What are the functions of these organelles?
-Hemoglobin --- carry oxygen and food while taking away wastes and carbon dioxide at the cell level.
-Plasma membrane --- function as a barrier, yet they readily pass ions (some against a concentration gradient), nutrients, and information (signals) between the cytoplasm and the extracellular environment.
-Network of supporting cytoskeleton --- Cell shape is maintained by the cytoskeleton

d. Why are these functions of the organelles important to the living cell?
-All organelles work together to conduct life processes. So, if an organelle is absent, the cell cannot function well.

18 comments:

  1. I did not know that the red blood cell had a cytoskeleton. It is something new.

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  3. i did not know it was actually biconcave in shape, i thought it was just round almost like a ball or an orange.

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  4. I knew that it was biconcave in shape but only thought that it was caused by the lack of a nucleus and never knew that it is to increase surface area for exchange of gases in the cell to take place

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  5. I did not know the cell had a cytoskeleton and that it is biconcave to increase surface area too

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  6. I did not know that the red blood cell didn't have any organelles at all.

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  7. I knew the red blood cell has no nucleus, but I didn't know that it has no organelles like small vacuoles

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  8. I did not know that Hemoglobin is the name of the organelle

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  9. I did not know that Red Blood cells had cytoskeletons and that they do not have any organelles.

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  10. I did not know that the the red blood cell had a plasma membrane and a cytoskeletons.

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  11. wow!I did not know that there was a cytoskeletons!

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  12. after reading this , i know that the cytoplasm contains Haemoglobin which carry oxygen and food while taking away wastes and carbon dioxide at the cell level.

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  13. I didnt even know that it has organelles,i thoguht it was a blood cell itself(with no nucleus,nothing at all,just a plain blood cell)

    ONG BING JUE

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  14. I did not know that there were such organelles inside the red blood cell and that it also has no nucleus.

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  15. I have learnt that a red blood cell is biconcave in shape which means that a dimple is present on both sides of the cell.
    Clarabelle (:

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  16. I didn't know that red blood cells has cytoskeletons .

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  17. i did not know that the cell membrane has no nucleus

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  18. i didn't know that it contains cytoskeletons and its shape is called biconcave.

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