Match the following columns and select the correct option : (a) Pneumotaxic Centre (i) Alveoli (b) O2 Dissociation curve

Question

Match the following columns and select the correct option :

Column-I		Column - 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)

Answer 1

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.