Q. No.An increase in carbon dioxide concentration in the blood would:
A: lead to an increase in the pH of CSF
B: stimulate respiration
1.
Only A
2.
Only B
3.
Both A and B
4.
Neither A nor B
Another centre present in the pons region of the brain can moderate the functions of the respiratory rhythm centre. What is incorrect regarding this centre?
1. It is called the pneumotaxic centre
2. It stimulates/prolongs inspiration
3. Its action can lead to the alteration of the respiratory rate
4. Signals from this centre can reduce the duration of inspiration
Consider the two statements:
I. About 97 percent of oxygen and 20-25 percent of carbon dioxide is transported by RBC.
II. Oxygen is more soluble in water than carbon dioxide
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. Both I and II are incorrect
Match the disorder given in Column I with the feature most closely related to the disorder in Column II and select the correct match from the codes given:
| COLUMN I | COLUMN II | ||
| A | Asthma | P | Inflammation of bronchi and bronchioles |
| B | Emphysema | Q | Damage to alveolar walls |
| C | Occupation lung disease | R | Pulmonary fibrosis |
| A | B | C | |
| 1. | P | Q | R |
| 2. | Q | P | R |
| 3. | Q | R | P |
| 4. | R | Q | P |
| Assertion (A): | The amount of carbon dioxide that can diffuse through the diffusion membrane per unit difference in partial pressure is much higher compared to that of oxygen. |
| Reason (R): | The solubility of carbon dioxide is 20 – 25 times lower than that of oxygen. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
| Tidal Volume | 400 ml |
| Expiratory reserve volume | 1000 ml |
| Inspiratory reserve volume | 2500 ml |
| Residual volume | 1000 ml |
His functional residual capacity and vital capacity respectively are:
| 1. | 2000 ml and 3900 ml | 2. | 2000 ml and 4900 ml |
| 3. | 1400 ml and 3900 ml | 4. | 1400 ml and 4900 ml |
| 1. | Every 100 ml of oxygenated blood can deliver around 5 ml of oxygen to the tissue under normal physiological conditions. |
| 2. | Oxygen gas has most potent effect on the central chemoreceptors and plays most vital role in regulation of respiration |
| 3. | Nearly 70 percent of carbon dioxide is carried as bicarbonate in the blood. |
| 4. | Every 100 ml of deoxygenated blood delivers about 4 ml of carbon dioxide to the alveoli. |
| I. Alveolar epithelium | II. Vascular endothelium |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
| I: | The factors are all favourable for the formation of oxyhemoglobin. |
| II: | Carbon dioxide trapped as bicarbonate at the tissue level is released out as carbon dioxide. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| 1. | Partial pressure of oxygen in alveolar air | 104 mm Hg |
| 2. | Partial pressure of carbon dioxide in deoxygenated blood | 45 mm Hg |
| 3. | Transport of carbon dioxide in blood as bicarbonate | 70 % |
| 4. | Transport of carbon dioxide as carbaminohemoglobin | 7 % |
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