Q. No.The maximum volume of air a person can breathe in after a forced expiration is known as:
1. Expiratory Capacity
2. Vital Capacity
3. Inspiratory Capacity
4. Total Lung Capacity
Select the correct statement:
| 1. | Expiration occurs due to external intercostal muscles. |
| 2. | Intrapulmonary pressure is lower than atmospheric pressure during inspiration. |
| 3. | Inspiration occurs when atmospheric pressure is less than intrapulmonary pressure. |
| 4. | Expiration is initiated due to the contraction of the diaphragm. |
“Binding of oxygen to hemoglobin makes hemoglobin a stronger acid” forms the physiological basis of:
1. Herring-Breur Reflex
2. Bohr effect
3. Haldane effect
4. Singultus
How many of the statements given below are correct?
| I. | During inspiration the diaphragm moves upward while the thorax expands and moves outward. |
| II. | The anatomical dead space represents the air that is trapped in the alveoli and is around 150mL. |
| III. | Decreasing blood oxygen and increasing carbon dioxide cause the major increases seen in breathing rate during strenuous exercise. |
| IV. | Oxygen dissociates faster from hemoglobin during exercise. |
| V. | Increased pH shifts oxyHb-dissociation curve to the right. |
| 1 | 2 | 2. | 3 |
| 3. | 4 | 4. | 5 |
The efficiency of a respiratory system would be increased by all the following except:
| 1. | increase the surface area available for diffusion of gases |
| 2. | decrease the distance over which the gases must diffuse |
| 3. | increase the concentration differences of gases inside and outside the system |
| 4. | dry the system out so the gases do not have to diffuse through water |
Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to:
| 1. | reduction in the secretion of surfactants by pneumocytes |
| 2. | benign growth on mucous lining of nasal cavity |
| 3. | inflammation of bronchi and bronchioles |
| 4. | proliferation of fibrous tissues and damage of the alveolar walls |
Tidal Volume and Expiratory Reserve Volume of an athlete is 500 mL and 1000 mL respectively. What will be his Expiratory Capacity if the Residual Volume is 1200 mL?
| 1. | 2700 mL | 2. | 1500 mL |
| 3. | 1700 mL | 4. | 2200 mL |
The effect of cigarette smoking and radon in combination on lungs is:
| 1. | Fatal | 2. | Synergistic |
| 3. | Mutualistic | 4. | Antagonistic |
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