Q. No.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.
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) |
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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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
Consider the following statements:
| I: | The thoracic chamber is anatomically an air tight chamber. |
| II: | Any change in the volume of the thoracic cavity will be reflected in the pulmonary cavity. |
1. Both I and II are correct and II explains I
2. Both I and II are correct and I explains II
3. Both I and II are correct but II does not explain I
4. Both I and II are incorrect
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Phonation is the function of:
| 1. | Larynx | 2. | Pharynx |
| 3. | Muscles of lips and tongue | 4. | Sinuses in the bones |
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