Breathing and Exchange of Gases

How does the Hb act as buffer?

Due to formation of oxyhaemoglobin, the pH of blood decreases due to release of $\mathrm{H}^{+}$ion and the $\mathrm{H}_2 \mathrm{CO}_3$ dissociates into $\mathrm{H}_2 \mathrm{O}$ and $\mathrm{CO}_2$. This is called __________ .

Match the Column I and II


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Select the INCORRECT statements.
i. The rate of formation of $\mathrm{H}_2 \mathrm{CO}_3$ is slower in RBCs and faster in plasma.
ii. Dissociation of $\mathrm{H}_2 \mathrm{CO}_3$ into $\mathrm{H}^{+}$and $\mathrm{HCO}_3^{-}$ takes place due...

Given below are two statements.
Statement I -The right lung is larger and divided into two lobes.
Statement II -The left lung is smaller and divided into three lobes.
In the light of above statements, select the correct option given below:

Select INCORRECT statement about the Hering-Breuer reflex.

Haemoglobin has maximum affinity for

Select INCORRECT statements with respects transport of $\mathrm{CO}_2$ by RBCs and plasma.
i. $23 \%$ of $\mathrm{CO}_2$ released from tissue cells diffuse into plasma first and then into RBCs.
ii. Within RBCs carbonic acid immediately diss...

Respiratory centres that control the rate and depth of breathing are located in __________

The partial pressure of carbon dioxide $\left(\mathrm{ppCO}_2\right)$ of blood entering the pulmonary capillaries is_______.