Question

Which of the following are favourable conditions for dissociation of oxygen in tissues?

• A. High ${\mathrm{pO}}_2$, low ${\mathrm{pCO}}_2$, less $H^{+}$ conc. and high temperature
• B. Low ${\mathrm{pO}}_2$, high ${\mathrm{pCO}}_2$, high$H^{+}$ conc. and high temperature
• C. High ${\mathrm{pO}}_2$, low ${\mathrm{pCO}}_2$, less $H^{+}$ conc. and low temperature
• D. low${\mathrm{pO}}_2$, low ${\mathrm{pCO}}_2$, less $H^{+}$ conc. and low temperature

Answer 1

The correct option is B Low ${\mathrm{pO}}_2$, high ${\mathrm{pCO}}_2$, high$H^{+}$ conc. and high temperature

In the tissues, low ${\mathrm{pO}}_2$ , high ${\mathrm{pCO}}_2$, high $H^{+}$conc. and high temperature favours dissociation of oxygen from the oxyhaemoglobin. Whereas high ${\mathrm{pO}}_2$ , low ${\mathrm{pCO}}_2$, low$H^{+}$conc. and low temperature are the factors favourable for the formation of oxyhaemoglobin in the alveoli.