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Grade: 11
        What is Haldane effect and bohr effect? How the oxygen saturation of Hb differs for this?
10 months ago

Answers : (2)

Arun
14739 Points
							
Dear Arnab
 
The simplest way to differentiate the two effects is to identify which molecule is the cause of the change.

The Haldane effect describes how oxygenconcentrations determine hemoglobin's affinity for carbon dioxide. For example, high oxygen concentrations enhance the unloading of carbon dioxide. The converse is also true: low oxygen concentations promote loading of carbon dioxide onto hemoglobin. In both situations, it is oxygen that causes the change in carbon dioxide levels.

The Bohr effect, on the other hand, describes how carbon dioxide and H+ affect the affinity of hemoglobin for oxygen. High CO2 and H+ concentrations cause decreases in affinity for oxygen, while low concentrations cause high affinity for oxygen. 

To further illustrate the difference, it might help to look at specific examples. In the lungs, when hemoglobin loaded with carbon dioxide is exposed to high oxygen levels, hemoglobin's affinity for carbon dioxide decreases. This is an example of the Haldane effect.

In active muscles, carbon dioxide and H+ levels are high. Oxygenated blood that flows past is affected by these conditions, and the affinity of hemoglobin for oxygen is decreased, allowing oxygen to be transferred to the tissues. Because we are looking at the situation from the perpsective of carbon dioxide changing oxygen affinity, this is an example of the Bohr effect.
 
 
Regards
Arun (askIITians forum expert)
10 months ago
Bhat Faisal
15 Points
							
bohr effect can be defined as the unloading of o2 molecule from oxyheamoglobin due to increase in co2 and H+ concentration while as haldane effect is the unloading of co2 molecule from heamoglobin due to increase in o2 conc.
23 days ago
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