Q. No.Which of the following is higher in value?
1.
Amount of carbon dioxide delivered by 100 ml of blood at lungs than amount of oxygen delivered by 100 ml of blood at tissues
2.
Amount of carbon dioxide transported by hemoglobin than amount of oxygen transported by hemoglobin
3.
The diffusing capacity of carbon dioxide across the respiratory membrane than the diffusing capacity of oxygen across the respiratory membrane
4.
Alveolar ventilation than the minute ventilation
It is necessary that lungs must be present in anatomically air-tight chamber because:
| 1. | we cannot directly alter the pulmonary volume |
| 2. | our lungs are not made of any elastic tissue |
| 3. | the pleural cavity always has a positive pressure with respect to pulmonary pressure |
| 4. | the partial pressure of oxygen in atmosphere is less than that in the alveoli |
The conducting part of the human respiratory system is not involved in:
| I: | clearing inhaled air from foreign particles |
| II: | humidifying the exhaled air |
| III: | bringing the air to a temperature higher than body temperature |
| 1. | Only I | 2. | Only II and III |
| 3. | Only I and II | 4. | I, II and III |
The amount of carbon dioxide that can diffuse through the diffusion membrane is much higher compared to that of oxygen because:
| 1. | the gradient across the membrane is much higher for carbon dioxide |
| 2. | carbon dioxide is more toxic than oxygen |
| 3. | solubility of carbon dioxide is much higher than that of oxygen |
| 4. | carbon dioxide has more affinity for hemoglobin than that of oxygen |
Pulmonary fibrosis is a pathological hallmark of:
1. Chronic obstructive lung disease
2. Bronchial asthma
3. Viral Pneumonia in children
4. Occupational lung diseases
Identify the incorrect statement regarding the enzyme carbonic anhydrase:
| 1. | RBCs contain a very high concentration of this enzyme |
| 2. | The enzyme is absent in the plasma |
| 3. | It facilitates the reaction catalyzed in both directions |
| 4. | It is a metalloenzyme |
Under normal physiological conditions, what amount of oxygen is delivered to the tissues?
| 1. | 4 ml | 2. | 5 ml |
| 3. | 15 ml | 4. | 20 ml |
Regarding pulmonary capacities, the maximum volume of air a person can breathe in after a forced expiration can also be defined as:
| 1. | Total volume of air a person can inspire or expire after a normal inspiration or expiration |
| 2. | Volume of air that will remain in the lungs after a normal expiration |
| 3. | Maximum volume of air a person can breathe out after a forced inspiration |
| 4. | Total volume of air accommodated in the lungs at the end of a forced inspiration |
1. 2nd thoracic vertebra
2. 3rd thoracic vertebra
3. 5th thoracic vertebra
4. 12th thoracic vertebra
Alveoli in the lungs are lined by:
1. a simple squamous epithelium.
2. a pseudostratified ciliated columnar epithelium.
3. a simple cuboidal epithelium.
4. a transitional epithelium.
© 2025 GoodEd Technologies Pvt. Ltd.