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 the brain
(c)	Carbonic Anhydrase	(iii)	Haemoglobin
(d)	Primary site of exchange of gases	(iv)	R.B.C.

   

Options:	(a)	(b)	(c)	(d)
1.	(i)	(iii)	(ii)	(iv)
2.	(ii)	(iii)	(iv)	(i)
3.	(iii)	(ii)	(iv)	(i)
4.	(iv)	(i)	(iii)	(ii)

Bulk of carbon dioxide (CO₂) released from body tissues into the blood is present as:
1. carbaminohaemoglobin in RBCs
2. bicarbonate in blood plasma and RBCs
3. free CO₂ in blood plasma
4. 70% carbaminohaemoglobin and 30% as bicarbonate

The Total Lung Capacity (TLC) is the total volume of air accommodated in the lungs at the end of forced inspiration.

This includes:

Transport of gases in alveoli takes place by:

Choose the incorrect statement

1. Every 100 ml of deoxygenated blood delivers approximately 4 ml of CO₂ to the alveoli

2. Carbonic anhydrase is present in very high concentration in RBC

3. High pCO₂ and low pO₂ in tissues help in binding of carbon dioxide

4. CO₂ is carried in haemoglobin as carboxyhaemoglobin 

In which of the following disorders there is difficulty in breathing causing wheezing due to inflammation of bronchi and bronchioles?

1. Emphysema

2. Asthma

3. Pleurisy

4. Tuberculosis

Carbonic anhydrase plays an important role in the transport of carbon dioxide in

1.  Leucocytes

2.  Thrombocytes

3.  Erythrocytes

4.  Platelets

Which of the following is not a symptom of asthma?

1. Difficulty in breathing

2. Breathing noisily/wheezing

3. Alveolar walls are damaged

4. Inflammation of bronchi and bronchioles

Match the lung volumes given in column I with their respective values in column II.

 Column-I                                       Column-II

a. Tidal volume                           (i) 1000 mL

b. Residual volume                     (ii) 2500-3500 mL

c. Inspiratory reserve volume      (iii) 1200 mL

d. Expiratory reserve volume       (iv) 500 mL

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

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

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

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

Excessive cigarette smoking leading to damage of alveolar walls is associated with

1. Asthma

2. Emphysema

3. Silicosis

4. Botulism