AQA Biology Unit 3 Tuesday 12th May 2015- *Official Thread*

People doing further additional, opposed to standalone science GCSE's had the egg question instead of the lung question

Okay, I just did advantages and disadvantages for the artificial heart valve and backed up my points, I made points about 3 advantages and 3 disadvantages with a slight comparison in the shortl conclusion so hopefully that's enough for the 6 marks.

They definitely didn't say artificial vs real valves.

For the 6 mark question, was it about the advantages and disadvantages of artificial heart valves, or advantages and disadvantages comparison of living human heart valves and artificial heart valves? HELP ME OUT!!!

No they said compare the advantages and disadvantages of living human heart valves against cow heart valves

I found it a lot easier than B2!!!


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What did you guys for the question, on how oxygen goes into the bloodstream, did you mention haemoglobin, or did you talk about diffusion?

I answered human heart valves vs cow valves!! uh oh please say thats right?

i did diffusion through cell membrane in the alveoli

What did you guys for the question, on how oxygen goes into the bloodstream, did you mention haemoglobin, or did you talk about diffusion?

diaphragm flattens>increased volume>decreased pressure>pressure differential>so air is drawn in

He's right. It was DEFINITELY the human and artificial for the Further Additional B3 Higher Pape

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