Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli.

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High pO₂, low pCO₂, less H⁺, lower temperature

Low pO₂, high pCO₂, high H⁺, high temperature

Low pO₂, low pCO₂, high H⁺, high temperature

High pO₂, high pCO₂, less H⁺, high temperature

answer is B.

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Detailed Solution

High pO₂, low pCO₂, low temperature are favorable the formation of oxyhaemoglobin.

Oxyhemoglobin formation is favored when the pO₂is high. In areas of the body where oxygen is abundant, such as the lungs, hemoglobin binds oxygen readily. Hemoglobin has a higher affinity for oxygen when the pO₂ is elevated, allowing it to bind with oxygen molecules to form oxyhemoglobin.
Low pCO2 levels also promote the formation of oxyhemoglobin. Hemoglobin's affinity for oxygen increases as pCO₂ decreases. In the lungs, where pCO2 is low due to exhalation of carbon dioxide, hemoglobin is more likely to bind with oxygen. At tissues, pCO₂ is high, enabling the supply of oxygen to tissues (dissociation).
Lower temperatures generally enhance the binding of oxygen to hemoglobin. High temperature at tissues due to metabolic reactions favour the dissociation of oxyhaemoglobin.

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