# Official AQA Biology Unit 3 14th May 2013 NEW SPEC watch

• View Poll Results: VOTE HERE--> What do you think the 6 marker will be?
Explaining features/functions of the lungs
8.15%
Ventilation
11.11%
Blood flow in heart
16.30%
Explain Transport in blood
5.19%
Explain Transport in plants
5.19%
Evaluate kidney transplants/dialysis
28.89%
Explain biogas generator
31.11%
12.59%
The effects of global warming
8.15%
Evaluate the use of Artificial blood
13.33%
Evaluate the effectiveness of sports drinks
11.11%

1. (Original post by issie1234)
Hello!

To get an a* overall you need to get at least 360% (out of 400%)

isa = 84%

94+88+84 = 266

360-266 = 94

So you need to get at least 94 to get an a* overall
Hi thanks but i thought 42/50 in ISA is a 92 UMS?
2. Just out of interest what are you all taking for A-levels? And what do you want to do when you leave sixth form?
3. (Original post by megan1997)
Just out of interest what are you all taking for A-levels? And what do you want to do when you leave sixth form?
I'm going to be doing History of Art, British History, English Lit and Philosophy. Completely (and gloriously ) unrelated to science! Hope to go to uni after to study English and History and end up teaching both

4. Biology geography maths physics
5. Maths, physics, geography and economics. No idea for uni...
6. (Original post by you-only-live-once)
Hi thanks but i thought 42/50 in ISA is a 92 UMS?
Well you don't know for sure what the UMS is until results day so you and your teachers can only guess.
7. Next year I'm taking biology, chemistry, English language and psychology. I have no idea what I want to do after sixth form though
8. (Original post by megan1997)
Thank you, whoops I did.

Explain and describe 3 ways in which the kidneys are efficient exchange surfaces (6 marks)
Since nobody else has, I'll answer this and hope you have the answers yourself since I'm not entirely sure:P I'll bullet point so the 6 marks are clearer 9presuming this isn't a quality of written communication question).

-The kidneys have a large surface area
-which increases the rate of diffusioin of moleules from the blood since moe molecules can diffuse into the kidney tubule at once.
-The kidneys have a constant blood suppl
-which constantly supplies waste rich blood contining lots of urea and waste mineral ions to maintain steep concentration gradients.
-The kidneys have thin membranes between the blood vessels and kidney tubules
-to decrease the distance of diffusion.

Two other points I guess could be added are:

-Contains mitochondria
-to release enegy in respiration in order to for active transport to take place forthe reabsorbtion of glucose, any needed water and any useful mineral ions.
9. Anyone hazard a guess as to what will come up in unit 3 higher gcse? Things that haven't come up previously or similar to past papers?
10. (Original post by megan1997)
Next year I'm taking biology, chemistry, English language and psychology. I have no idea what I want to do after sixth form though
Maths, Further Maths, Physics, Ecomomics can't wait
11. (Original post by megan1997)
Just out of interest what are you all taking for A-levels? And what do you want to do when you leave sixth form?

Physics, Maths and Engineering.

In Uni - not sure, once we get the grades then we can decide.
12. By the way everyone http://www.my-gcsescience.com/ is a good website with videos on everything pretty much for each science
13. (Original post by Last Theorem)
Since nobody else has, I'll answer this and hope you have the answers yourself since I'm not entirely sure:P I'll bullet point so the 6 marks are clearer 9presuming this isn't a quality of written communication question).

-The kidneys have a large surface area
-which increases the rate of diffusioin of moleules from the blood since moe molecules can diffuse into the kidney tubule at once.
-The kidneys have a constant blood suppl
-which constantly supplies waste rich blood contining lots of urea and waste mineral ions to maintain steep concentration gradients.
-The kidneys have thin membranes between the blood vessels and kidney tubules
-to decrease the distance of diffusion.

Two other points I guess could be added are:

-Contains mitochondria
-to release enegy in respiration in order to for active transport to take place forthe reabsorbtion of glucose, any needed water and any useful mineral ions.
Yeah that's all right. The only thing is all of the mark schemes I've seen with kidney questions say good blood supply not constant.
14. I am doing chemistry, biology, physics and maths because I want to be a doctor
15. (Original post by WillowXxx)
I am doing chemistry, biology, physics and maths because I want to be a doctor
I want to be a doctor too but don't have good enough GCSE grades so far. Were not allowed to do physics without maths at my sixth form so couldn't choose physics even though I wanted too
16. (Original post by megan1997)
Just out of interest what are you all taking for A-levels? And what do you want to do when you leave sixth form?
Maths, chemistry, biology & history purely as i enjoy those subjects want to do something medical in uni but that will depend on results etc...
17. (Original post by megan1997)
I want to be a doctor too but don't have good enough GCSE grades so far. Were not allowed to do physics without maths at my sixth form so couldn't choose physics even though I wanted too
18. (Original post by megan1997)
I want to be a doctor too but don't have good enough GCSE grades so far. Were not allowed to do physics without maths at my sixth form so couldn't choose physics even though I wanted too
I dont think you can say that your results arent good enough. personally i think that the alevel results are significantly more important...DONT GIVE UP HOPE!
19. (Original post by WillowXxx)
I am doing chemistry, biology, physics and maths because I want to be a doctor
20. (Original post by WillowXxx)
I am doing chemistry, biology, physics and maths because I want to be a doctor
do you know where you want to study ?

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