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Describe the role of the loops of Henle in the process of concentrating urine.

The loop of Henle is made up first of a descending limb and then an ascending limb. The descending limb is permeable to both water and sodium and chloride ions, whereas the ascending limb is impermeable to w...
HW
Answered by Harry W. • Biology tutor
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Find the values of x where x+3>2/(x-4), what about x+3>2/mod(x-4)?

a) Create an inequality in x: (x+3)(x-4)<2. Expand and find the critical points, x^2-x-14>0. Find the answers to this inequality using quadratic formula and then test for a value between your two criti...
BH
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using integration by parts evaluate the integral of xsinx between x=0 and x =pi/2

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Answered by Gabriel F. • Maths tutor
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[Question and answer both written in the 'answer' box because the question is long]

We should all be more careful when using social networking sites like Facebook due to the risk of identity theft. Identity thieves operate by getting hold of an individual's home address, which can assist th...
JM
Answered by Joe M. • TSA Oxford tutor
2751 Views

What were the causes of WWI?

The causes of WWI are very complex, however some of the main points were: (I) The Alliance system which emerged in the 1890s, splitting Europe into two camps of Britain, France and Russia, and Germany, Italy...
MW
Answered by Michael W. • History tutor
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