Rate of breathing in a newborn is about . . . . . . times per minute.

Match the following:

Column-$I$	Column-$II$
$1$. $97\%$ of $O_2$ is transported	$p$. Bicarbonate
$2$. $70\%$ of $CO_2$ is transported	$q$. $RBC$
$3$. $100$ $ml$ of oxygenated blood	$r$. $4$ $ml$
$4$. $100$ $ml$ of deoxygenated blood	$s$. $5$ $ml$

When the external temperature is higher than our body temperature, we regulate it by $........$, and when it is lower than our body temperature, we regulate it by $........$.

For completion of the respiration process,write the given steps in sequential manner.
$(a)$ Diffusion of gases ($O_2$ and $CO_2$) across alveolar membrane.
$(b)$ Transport of gases by blood.
$(c)$ Utilisation of $O_2$ by the cells for catabolic reactions and resultant release of $CO_2$.
$(d)$ Pulmonary ventilation by which atmospheric air is drawn in and $CO_2$ rich alveolar air is released out.
$(e)$ Diffusion of $O_2$ and $CO_2$ between blood and tissues.

Match the partial pressure of carbon dioxide in different parts involved in diffusion in comparison to the atmosphere.

Column-$I$	Column-$II$ ($mm\, Hg$ pressure)
$P$. Atmospheric air	$I$. $40$
$Q$. Tissues	$II$. $45$
$R$. Oxygenated blood	$III$. $0.3$

Statement-$I$: All the factors in our body are favourable for the diffusion of $O_2$ from alveoli to tissues and that of $CO_2$ from tissues to alveoli.
Statement-$II$: $A$ sigmoid curve is obtained when the percentage saturation of haemoglobin with $O_2$ is plotted against the $pO_2$.