Question

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

• A. Low pO_2, High pCO₂, more H⁺, higher temperature.
• B. High pO_2, Low pCO₂, less H⁺, lower temperature.
• C. High pO_2, High pCO₂, less H⁺, Higher temperature.
• D. Low pO_2, Low pCO₂, more H⁺, higher temperature.

Answer 1

The correct option is B

High pO_2, Low pCO₂, less H⁺, lower temperature.

The correct option is B.

Explanation of the correct option:

1. pO₂: The higher the partial pressure of oxygen, the more efficiently haemoglobin binds to oxygen.
2. Temperature: Normal body temperature promotes hemoglobin-oxygen binding. The dissociation of oxygen from haemoglobin is caused at high temperatures.
3. pCO₂: A large amount of carbon dioxide reduces the formation of oxyhemoglobin. Carbon dioxide has a higher affinity for haemoglobin than oxygen.
4. H⁺ : An increase in the concentration of hydrogen ions or a decrease in pH causes haemoglobin dissociation to increase.

Final answer: The favorable conditions required for the formation of oxyhemoglobin at the alveoli are high pO_2, low pCO₂, less H⁺, and lower temperature.