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    Has anyone got any links for questions that may come up in the pre-release? Thanks if you do, I'll love you for the rest of my life.
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    found this ques interesting

    explain why these changes in the percentage distribution of blood during exercise are neccessary.
    (5marks)

    1. muscle contracts faster during exercise
    2. needs more ATP
    3. more glucose/O2 needed
    4, more CO2 removed
    5. blood diverted away from less important parts
    6. increase in blood flow to the skin to lose heat
    7. to maintain temperature (thermoregulation)

    ciao! biology 5=nightmare D:
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    (Original post by JizzMan)
    here ya go
    THANK YOUUU sooooo muchhhhhh!!!!! DDDDDDDDDDDDDDDDDDD
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    (Original post by kate_93)
    Has anyone got any links for questions that may come up in the pre-release? Thanks if you do, I'll love you for the rest of my life.
    here u go, u can also check the thread for the scientific article
    link :http://www.thestudentroom.co.uk/show....php?t=1948344
    Attached Files
  1. File Type: doc expected qu.doc (226.5 KB, 84 views)
  2. File Type: docx Biology Unit 5 - Possible questions.docx (35.7 KB, 85 views)
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    am going to have dinner. Put my feet up and get an early night!
    Thanks for all your help and GOOD LUCK EVERYONE!!!

    Can't wait to chat/moan after the exam. I love knowing how other people find it!
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    What does all or nothing and refractory period mean anyoneee?
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    (Original post by Cleoleo)
    What does all or nothing and refractory period mean anyoneee?
    Refractory period = When the ion channels are recovering after a neurone cell membrane has become stimulated and the ion channels cant be opened. The refractory period acts as a time delay between one action potential and the next. It also makes sure action potentials are unidirectional

    Not quite sure what you mean by all or nothing? Anyone want to expand?
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    pple got a qu

    paragraph 41 suggests the use of gene therapy. explain how they could transform stem cells with the PRDM16 gene?

    so what is the ans ?
    is it by GE?
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    (Original post by kate_93)
    Has anyone got any links for questions that may come up in the pre-release? Thanks if you do, I'll love you for the rest of my life.
    check this link:
    http://www.thestudentroom.co.uk/show....php?t=1948344
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    (Original post by Cleoleo)
    What does all or nothing and refractory period mean anyoneee?

    (Original post by user3456)

    Not quite sure what you mean by all or nothing? Anyone want to expand?
    All or nothing is on page 205 in the textbook. It means that the initial depolarisation of the neurone causes Na+ gates to open. It just means that action potentials are either occuring or they're not. It's linked to positive feedback.
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    Has anyone got any links for questions that may come up in the pre-release? Thanks if you do, I'll love you for the rest of my life.
    http://www.scribd.com/doc/97804758/Q...ticle-June2012
    http://www.scribd.com/doc/89838095/S...Stafford-Final
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    thank you, love you.
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    -snip- didn't realise this was the edexcel thread, whoops.
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    (Original post by ghogho)
    pple got a qu

    paragraph 41 suggests the use of gene therapy. explain how they could transform stem cells with the PRDM16 gene?

    so what is the ans ?
    is it by GE?
    yepp
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    thnx alot!!
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    Does anyone have a list of potential topics that may come up in the article, any synoptic points? I know gene expression because there's a whole section on it but anything else? I was thinking maybe some atherosclerosis?
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    (Original post by nadzzdan)
    yepp
    aha okay thx
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    OMG, Gene expression Paragraphs (43-48) fadskjfnhkdsj ??:s

    I just dont understand what they're trying to get to in the Article Paragraphs (43-48).
    I get everything else in the Article but this... :| . Someone care to explain please in a short summary, and what topics id have to read over for this bit

    Thanks
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    best of luck peeps
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    (Original post by ghogho)
    pple got a qu

    paragraph 41 suggests the use of gene therapy. explain how they could transform stem cells with the PRDM16 gene?

    so what is the ans ?
    is it by GE?
    PRDM16 gene and its suitable transcriotion factors are mixed with the stem cells.
    then it soehoe attaches to the cells DNA ! i was thinking wouldnt the entire vector thingy come in this, like plasmid and then infect the cell with this virus ...or maybe not ??!
 
 
 
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