A: When a person starts doing exercise,the ra | vedclass

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(A) $1$. During the initiation of physical exercise,the body requires an immediate increase in oxygen supply and carbon dioxide removal.$2$. The respi

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Assertion and Reason both are correct and Reason is the correct explanation of Assertion.

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(A) $1$. During the initiation of physical exercise,the body requires an immediate increase in oxygen supply and carbon dioxide removal.$2$. The respiratory centers in the medulla oblongata and pons receive anticipatory signals from the cerebral cortex and sensory inputs from proprioceptors located in joints and muscles.$3$. These proprioceptors detect the movement of limbs even before chemical changes (like a drop in $pO_2$ or rise in $pCO_2$ and $H^+$) occur in the blood.$4$. This neural mechanism allows for a rapid adjustment in the rate and depth of breathing to meet the metabolic demands of the muscles.$5$. Therefore,both the Assertion and the Reason are correct,and the Reason provides the correct explanation for the observed phenomenon.

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

Column $I$	Column $II$
$(a)$ Pneumotaxic Centre	$(i)$ Alveoli
$(b)$ $O_{2}$ Dissociation curve	$(ii)$ Pons region of brain
$(c)$ Carbonic Anhydrase	$(iii)$ Haemoglobin
$(d)$ Primary site of exchange of gases	$(iv)$ $R.B.C.$

$A$: When a person starts doing exercise,the rate and depth of breathing increase even before there are changes in $pO_2$,$pCO_2$,or $H^+$ concentration.
$R$: The main stimulus for these quick changes is due to input from the proprioreceptors,which monitor movements of joints and muscles.

Similar Questions

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 $III$. $0.3$

Match the following columns and select the correct option:

Column $I$ Column $II$

$(a)$ Pneumotaxic Centre $(i)$ Alveoli

$(b)$ $O_{2}$ Dissociation curve $(ii)$ Pons region of brain

$(c)$ Carbonic Anhydrase $(iii)$ Haemoglobin

$(d)$ Primary site of exchange of gases $(iv)$ $R.B.C.$

People who have migrated from the plains to an area adjoining Rohtang Pass about six months back:

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$A$: When a person starts doing exercise,the rate and depth of breathing increase even before there are changes in $pO_2$,$pCO_2$,or $H^+$ concentration.$R$: The main stimulus for these quick changes is due to input from the proprioreceptors,which monitor movements of joints and muscles.