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What is the Bohr effect and how does it affect oxygen unloading?

The Bohr effect describes the change in affinity for oxygen haemoglobin has as a result of an increased partial pressure of CO2. It occurs due to the reaction between CO2 and H20, catalysed by carbonic an...

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Answered by Tom M. Biology tutor
8822 Views

Why is the Mg2+ ion smaller in radius than the Na+ ion?

The magnesium ion is in group two of the periodic table, whereas sodium is in group one. This means that magnesium has one more proton than the sodium ion, so it has a more positive core. Both ions have t...

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Answered by Olivia D. Chemistry tutor
10737 Views

How do white blood cells respond to infections?

The white blood cells detect the foreign antigens on the cells surface. They then rapidly produce antibodies which match the antigens and attach onto them. This allows other white blood cells to engulf th...

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Answered by Olivia D. Biology tutor
3104 Views

Explain why, in the long run, a firm will always make normal profits.

The condition for this scenario is that perfect competition must hold, whereby there is free entry to and exit from the market, and perfect information is available to all firms.In the short run, if firms...

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Answered by Joe R. Economics tutor
2104 Views

‘The downfall of Tsar Nicholas II in February/March 1917 was due to popular discontent with the tsarist regime.’

'Let those in power make no mistake about the mood of the people… never were the Russian people… so profoundly revolutionised by the actions of the government, for day by day, faith in the government is s...

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Answered by Ann-Marie D. History tutor
5796 Views

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