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This is through a mechanism called the countercurrent mechanism at the Loop of Henle that looks like a hair pin. It works by creating a concentration gradient between the nephron and the interstitium whic...

The structure of an introduction is simple and should follow these lines: ‘In light of this question, this is the argument I am going to make, and I intend to make it in this way’. In order to ensure it i...

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Break this question down into 2 halves to make it easier to answer:

1. "What is meant by 'active transport' " : Active transpor...

This question uses a combination of standard differentiation and the product rule. The second part of the equation cos(x)sin(x) is the product of two funtions so the product rule must be used. Product rul...

Both of these tenses are used to denote events that occured in the past, but they are troublesome for several reasons and used in broadly different contexts. First, it is important to note that the imperf...