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Match the following columns and select the correct option :

Column-IColumn - II
(a)Pneumotaxic Centre(i)Alveoli
(b)O2 Dissociation curve(ii)Pons region of brain brain
(c)Carbonic Anhydrase(iii)Haemoglobin
(d)Primary site of exchange of gases(iv)R.B.C.

(1) (a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)

(2) (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)

(3) (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)

(4) (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)

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1 Answer

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Answer (3) (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)

Sol. The correct answer is option (3) because pneumotaxic centre is present in the pons region of the brain.

In O2 dissociation curve, percentage saturation of haemoglobin is plotted against the pO2. Carbonic anhydrase is mainly present in the RBCs and its minute quantity is present in the plasma.

Alveoli are the primary sites of exchange of gases.

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