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How is a concentrated filtrate produced in the kidney to remove harmful toxins from the body?

To begin with, sodium ions are actively (using ATP) pumped out of the ascending limb of the loop of henle, however, as the ascending limb is impermeable, water remains . This creates a lower water potenti...

DW
Answered by Dan W. Biology tutor
2895 Views

Differentiate y=(x^2 + 2x)cos(3x)

Here we need to use the product rule in order to differentiate as we have two functions involved that are being multiplied together. Therefore we use the formula:dy/dx = u dv/dx + v du/dxFirst let u=(x^2 ...

KB
Answered by Katie B. Maths tutor
3828 Views

Explain the teleological argument and Hume’s criticisms of it.

Essay Tips
- Explain, evaluate, analyse- it is important to consider the wording of the question as it indicates how the essay should be structured and to what extent a critic...

TD
6785 Views

Show that x^2 +6x+ 11 can be written as (x+p)^2 +q

x2 +6x +11this is a quadratic so we try to factorise it. x2 +6x can be turned into (x+3)2 -9 and we plus the 11 from the beginning so the final answer should look like (x+...

AM
Answered by Abdullahi M. Maths tutor
5201 Views

How may allopatric and sympatric speciation be distinguished? (4 marks)

First it is important to establish what a species is. A species is a population of similar organisms that can interbreed to produce fertile offspring; meaning they are reproductively isolated from other s...

GL
Answered by Gabrielle L. Biology tutor
5758 Views

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