Q. No.Name the cavities in which the lungs are located:
1. pleural and abdominal cavities.
2. pericardial and thoracic cavities.
3. pleural and thoracic cavities.
4. pleural and pericardial cavities.
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A minimal amount of pleural fluid present in the pleural cavity:
| 1. | provides a medium for the exchange of respiratory gases |
| 2. | reduces friction between the visceral and parietal pleurae |
| 3. | provides lubrication for movements of the diaphragm |
| 4. | permits the exchange of electrolytes during respiration |
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During deglutition, the food is prevented from entering into the larynx by the cartilaginous:
| 1. epiglottis | 2. glottis |
| 3. aryepiglottic fold | 4. laryngeal prominence |
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Most of the aquatic arthropods respire through:
| 1. diffusion over entire body surface | 2. gills |
| 3. tracheae and tracheoles | 4. skin |
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The trachea divides into a right and a left primary bronchus at the level of:
| 1. | 2nd thoracic vertebra | 2. | 3rd thoracic vertebra |
| 3. | 5th thoracic vertebra | 4. | 12th thoracic vertebra |
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The alveoli are lined with:
1. Simple cuboidal epithelium
2. Pseudo-stratified columnar ciliated epithelium
3. Transitional epithelium
4. Simple squamous epithelium
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Branchial respiration is seen in all the following except:
| 1. Aquatic arthropods | 2. Fishes |
| 3. Amphibians like frog | 4. Aquatic mollusks |
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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 |
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Incomplete cartilaginous rings are seen in the walls of all the following except:
| 1. Trachea | 2. Primary bronchus |
| 3. Tertiary bronchus | 4. Respiratory bronchiole |
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| I: | P is an incomplete cartilaginous ring seen only in trachea and principal bronchus. |
| II: | Q is the point where the trachea divides into a right and left primary bronchus and corresponds to the level of 5th thoracic vertebra. |
| III: | R shows the double-layered pleura where the outer pleural membrane is in close contact with the thoracic lining. |
| IV: | S is pleural cavity with minimal amount of pleural fluid which reduces friction on the lung surface. |
| 1. Only I, II and III | 2. Only I, III and IV |
| 3. Only II, III and IV | 4. I, II, III and IV |
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