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    (Original post by Huntx)
    Why was the tumour white on the scan? I left that and another 4 marker blank. 6 marks gone. Lost 1 or 2 marks on pretty much all the questions
    Because tumour's density is different to that of the brain cells present, so it appears as an abnormality and hence appears white.

    Pretty sure that's come up before.
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    (Original post by nukethemaly)
    Adrenaline is a hormone I thought so wrote acetylcholine.
    lol adrenaline is also a neurotransmitter
    i only remembered because I remember reading about adrenergic and dopaminergic nerves
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    (Original post by nukethemaly)
    Because tumour's density is different to that of the brain cells present, so it appears as an abnormality and hence appears white.

    Pretty sure that's come up before.
    Cool, That is all I could think off really. I was taking about the different density/composition of the tumour.

    Tough paper though. There were half a dozen 5 markers in that paper. Also that dogdy 4 marker about metabolic reactions added to the awkwardness.
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    adrenaline is more of a hormone than neurotransmitter actually :/
    acetyl choline is the answer i guess
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    Does anyone know where you can get the question paper for this exam?
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    Does anyone know where you can get the question paper for this exam?
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    Does anyone know where you can get the international papers from for this exam and unite 5 exam?
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    Can anyone explain to me the question about seaweed?? Question 7) b) ii) ?

    http://www.paigntononline.com/wp-con...e_20110613.pdf
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    (Original post by bethcraske)
    Can anyone explain to me the question about seaweed?? Question 7) b) ii) ?

    http://www.paigntononline.com/wp-con...e_20110613.pdf
    Green is found in the middle and blue in the deep? As the water gets deeper the prominent wavelengths get shorter so blue is deeper than green.


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