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Edexcel GCE Biology Unit 4 6BI04 June 2013

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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

I said because the Ct scans show only black and white images and a tumour does not contain much myoglobin because theres not a lot of oxygen rich blood which would make it appear darker

Reply 641

Sly1

Original post by Zarthast

It was Nor - Adrenaline because its a neurotransmitter that increases heart rate, I literally read it before the exam

Acetylcholine decreases heart rate too

Reply 642

ebainbridge

Original post by Huntx

But there's always only one grade boundary put up for the paper. So are 2 different papers gona be graded equally? Edexcel are coonts

I just realised you are in Kenya! That is why you got the same exam as the UK - you only have a 2 hour time difference! It will be one exam for one time zone and one for the other, not into vs domestic x soz! We are just used to referring to ourselves as intl. students.

Reply 643

nukethemaly

Original post by Zarthast

It was Nor - Adrenaline because its a neurotransmitter that increases heart rate, I literally read it before the exam

Adrenaline is a hormone I thought so wrote acetylcholine.

Reply 644

nukethemaly

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.

Reply 645

shahruk

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

Reply 646

C94

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.

Reply 647

iwantopas19

adrenaline is more of a hormone than neurotransmitter actually :/
acetyl choline is the answer i guess

Reply 648

forrestgump94

Does anyone know where you can get the question paper for this exam?

Reply 649

forrestgump94

Does anyone know where you can get the question paper for this exam?

Reply 650

AnthonyHolland

Does anyone know where you can get the international papers from for this exam and unite 5 exam?

Reply 651

bethcraske

Can anyone explain to me the question about seaweed?? Question 7) b) ii) ?

http://www.paigntononline.com/wp-content/uploads/2013/12/6BI04_01_que_20110613.pdf

Reply 652

VSEPR

Original post by bethcraske

Can anyone explain to me the question about seaweed?? Question 7) b) ii) ?

http://www.paigntononline.com/wp-content/uploads/2013/12/6BI04_01_que_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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Edexcel GCE Biology Unit 4 6BI04 June 2013

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