Qualification > Reference Material
Edexcel biology 2012 June scientific article (Discussions)
High-R:
In paragraph/line 3...they have mentioned "type2 diabetes, heart disease and certain types of cancer"...they could ask us sumthing like a cause and correlation question....
even symptoms/risks of heart disease, type2 diabetes cud be asked!
....a general question on other risk factors of heart disease =P refering to unit1 studies!
wats thin media images?..and paragraph 7..cud any1 explain :S....
it wud be much appreciated if u all discuss watever concepts/points ur eye can relate to the units! so we all can revise those points and ace it together (Y) iA! :D
High-R:
any progress here?
more questions please? :P
hixam:
ethical issues of DBS?
Can worsen conditions of diseases if not placed in the right area of brain, not 100% guaranteed to work, costly?, only available to patients with severe conditions.
why/how does parkinsons cause tremors and involuntary movement?
Parkinsons disease results in death of dopamine secreting neurones in the basal ganglia, which normally release dopamine in motor cortex. Therefore the motor cortexes are not able to recieve dopamine which leads to loss of control of movement and tremors.
list shortcomings of levedopa and drug-telated treartment?
advantages of DBS over other treatments?
Do not have to take tablets, can be calibrated for optimum results
describe and explain side effects of DBS?
apathy (emotions become supressed), hallucinations, compulsive gambling,
hypersexuality, cognitive dysfunction (loss of intellectual functions), and depression (I assume it disrupts Serotonin levels?)
Explain ( in short detail) how DBS works to traet brain disorders?
DBS sends high frequency electrical impulses to specific areas to interfere with brain activity (passing of impulses through motor neurones) and regain some control.
Explain why DBS can be used to treat a multitude of disorders?
The lead for DBS can be placed at different areas of brain according to different symptoms
maania:
salam
http://edexcelbiosolutions.com/
did anyone come across this website ?
has anyone purchased this pdf file ?
farhanyen:
I haven't used that website before but I think the best questions and answers are by Examwizard(for edexcel). They can be found for all science AS and A2 on thies website. Hundreds of questions per unit thousands per subject. Comes with answers. Very similar to past papers, some are from past papers. It is by edexcel and they sell it at 200 pounds per subject,but you can get it free here.
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