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Humans need to remove (excrete) waste products from the bloodstream. Describe the processes that produce waste products and how the products are removed from the body. (6 marks)

Urea is produced via the breakdown of amino acids in the liver, which is removed from the blood by the kidneys and excreted in urine. Carbon dioxide

KJ
Answered by Kizzy J. • Biology tutor
21658 Views

Integrate lnx

This question often throws maths students off fairly easily as they are generally not taught the integral of lnx, and do not usually realise that integration by parts can be used for anything, as you can ...

OM
Answered by Owen M. • Maths tutor
3354 Views

How effective was the nuclear arms race in restraining the aggression of the superpowers in the years 1955 to 1963?

This is a common A2 exam question for those studying the Cold War. When tutoring a student, I would identify their course and study the mark scheme for the board they are being examined with and frame the...

GS
Answered by Georgia S. • History tutor
8301 Views

Find the coordinates of the stationary point of the graph y = 3x^2 - 12x

Firstly, we need to differentiate the equation to find an equation for the gradient of the line.dy/dx = 6x-12We know the original graph was quadratic, and therefore only has one stationary point. This is ...

JM
Answered by Jack M. • Maths tutor
6434 Views

With the aid of a diagram describe the events occurring in the neurone leading to the establishment of an action potential

Voltage-gated Na+ channels and Voltage-gated K+ channels are closed at rest, Once a stimulus is applied, the neurotransmitters activate chemically-gated (CG) channels within the cell...

OY
Answered by Olga Y. • Biology tutor
3349 Views

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