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It is maintained primarily through the maintenance of a sodium and potassium gradient across the cell membrane. The concentration of sodium is high outside the cell, extra-cellularly, and the potassium co...

The first step to analysing any unseen piece of verse is to read it all the way through without stopping or taking notes. This grants you an understanding of the text’s tone, its rhyme or rhythm, and full...

We need to maximise the value of (a^2)b given that a+b = 20.The first step is to note that we can eliminate b from these equations to give a problem in just one variable. We have b = 20 - a, so (a^2)b = (...

The LNAT essay is not likely to be anything like an essay that you've written for any of your other subjects. You can't revise for it in the traditional sense. However, that does not mean that you cannot ...

You will never get a source that tells you nothing. Often times, you will be given deliberately odd sources, just to see if you can think on your feet. In these cases, it helps to think about the context ...