Question

Which of the following factors in the alveoli favour the formation of oxyhaemoglobin?

• A. High partial pressure of CO${}_2$, lesser H${}^{+}$ concentration
• B. Low partial pressure of O${}_2$, lower temperature
• C. High partial pressure of O${}_2$, lesser H${}^{+}$ concentration
• D. High H${}^{+}$ concentration, higher temperature

Answer 1

The correct option is C High partial pressure of O${}_2$, lesser H${}^{+}$ concentration

In the alveoli, where there is high pO${}_2$, low pCO${}_2$, lesser H${}^{+}$ concentration and lower temperature, the factors are all favourable for the formation of oxyhaemoglobin, whereas in the tissues, where low pO${}_2$, high pCO${}_2$, high H${}^{+}$ concentration and higher temperature exist, the conditions are favourable for dissociation of oxygen from the oxyhaemoglobin.