Q. No.Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?
1. Inflammation of bronchioles; decreased respiratory surface
2. Increased number of bronchioles; increased respiratory surface
3. Increased respiratory surface; inflammation of bronchioles
4. Decreased respiratory surface; inflammation of bronchioles
2. Increased number of bronchioles; increased respiratory surface
3. Increased respiratory surface; inflammation of bronchioles
4. Decreased respiratory surface; inflammation of bronchioles
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| Column I | Column II | ||
| a. | Tidal volume | (i) | 2500-3000 mL |
| b. | Inspiratory Reserve | (ii) | 1100-1200 mL |
| c. | Expiratory Reserve | (iii) | 500-550 mL |
| d. | Residual volume | (iv) | 1000-1100 mL |
| a | b | c | d | |
| 1. | iii | ii | i | iv |
| 2. | iii | i | iv | ii |
| 3. | i | iv | ii | iii |
| 4. | iv | iii | ii | i |
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Transport of gases in alveoli takes place by:
| 1. Active transport | 2. Passive transport |
| 3. Simple diffusion | 4. None of the above |
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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. |
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (iii) | (ii) | (iv) |
| 2. | (ii) | (iii) | (iv) | (i) |
| 3. | (iii) | (ii) | (iv) | (i) |
| 4. | (iv) | (i) | (iii) | (ii) |
Identify the wrong statement with reference to the transport of oxygen.
| 1. | Partial pressure of CO2 can interfere with O2 binding with haemoglobin. |
| 2. | Higher H+ conc. in alveoli favours the formation of oxyhaemoglobin. |
| 3. | Low pCO2 in alveoli favours the formation of oxyhaemoglobin. |
| 4. | Binding of oxygen with haemoglobin is mainly related to partial pressure of O2. |
Pulmonary fibrosis is a characteristic feature of all cases of:
| 1. | Occupational lung diseases | 2. | Bronchial asthma |
| 3. | Emphysema | 4. | Pneumonia |
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All the following are favorable for the formation of oxyhemoglobin at the lungs except:
| 1. | High PO2 | 2. | Low PCO2 |
| 3. | Low temperature | 4. | Low pH |
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The given graph shows the pulmonary volumes of a healthy man recorded on spirometer.
Which of the following would be correct?
1. D can be exhaled only after maximum expiratory efforts
2. The value of B will be different for inhalation and exhalation
3. The amount of air remaining in lungs after a normal exhalation is C + D
4. Total lung capacity cannot be calculated from this graph as it includes residual volume
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Which of the following will bring about inhalation in human beings?
I. Contraction of diaphragm
II. Contraction of internal intercostals
III. Contraction of external intercostals
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
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Under normal resting conditions, almost all respiratory effort is due to:
1. contraction and relaxation of diaphragm
2. elevation of rib cage
3. depression of rib cage
4. contraction of abdominal muscles
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