Persons living at high altitude will have

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(D) At high altitudes,the partial pressure of oxygen $(pO_2)$ in the atmosphere is significantly lower than at sea level.To compensate for this low ox

Vedclass · Accepted Answer

All of the above

Vedclass · Answer

(D) At high altitudes,the partial pressure of oxygen $(pO_2)$ in the atmosphere is significantly lower than at sea level.To compensate for this low oxygen availability and to maintain adequate tissue oxygenation,the body undergoes several physiological adaptations.These include an increase in the number of erythrocytes ($RBC$ count),an increase in haemoglobin concentration,and an increase in the respiratory and heart rates.Furthermore,the oxygen-haemoglobin dissociation curve shifts to the right (Bohr effect) to facilitate the unloading of oxygen to the tissues.Therefore,all the given options are correct physiological responses to high-altitude living.

List-$I$	List-$II$
$A$. Emphysema	$I$. Rapid spasms in muscle due to low $Ca^{++}$ in body fluid
$B$. Angina Pectoris	$II$. Damaged alveolar walls and decreased respiratory surface
$C$. Glomerulonephritis	$III$. Acute chest pain when not enough oxygen is reaching to heart muscle
$D$. Tetany	$IV$. Inflammation of glomeruli of kidney

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