Q.
Read the following statements and find out the incorrect statement(s).
a. The binding of $CO_2$ with haemoglobin is related to the partial pressure of $CO_2-pO_2$ is a major factor which could affect this binding.
b. When $pCO_2$ is low and $pO_2$ is high as in the alveoli, more binding of $CO_2$ occurs, whereas when the $pCO_2$ is high and $pO_2$ is low as in the tissues, dissolution of $CO_2$ from carbamino-haemoglobin takes place.
c. At the tissue site, where partial pressure of $CO_2$ is high due to catabolism, $CO_2$ diffuses into blood (RBCs and plasma) and forms $HCO_{3}^{-}$ and $H^{+}$. At the alveolar site where $pCO_2$ is low, the reaction proceeds in the opposite direction leading to the
fomiation of $CO_2$ and $H_2O$.
d. Oxygen dissociation curve is highly useful in studying the effect of factor like $pCO_2$, $H^{+}$ concentration, etc., on binding of $O_2$ with haemoglobin.
Breathing and Exchange of Gases
Solution: