- 1(current)
Q. No.Which of the following adaptations for gas exchange is most characteristic of insects?
1. lungs
2. tracheal tubes (tracheae)
3. parabronchi
4. air sacs
1. lungs
2. tracheal tubes (tracheae)
3. parabronchi
4. air sacs
Subtopic: Â Respiratory Organs |
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Level 1: 80%+
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Lower invertebrates like sponges, coelenterates, flatworms, etc., exchange O2 with CO2 by simple diffusion:
1. conducted to and from the tissues by a network of tubes.
2. over their entire body surface.
3. using their moist cuticle.
4. across the gills.
1. conducted to and from the tissues by a network of tubes.
2. over their entire body surface.
3. using their moist cuticle.
4. across the gills.
Subtopic: Â Respiratory Organs |
 90%
Level 1: 80%+
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Consider the given two statements:
| Statement I: | The outer pleural membrane is in close contact with the thoracic lining. |
| Statement II: | The inner pleural membrane is in contact with the lung surface. |
| Statement III: | The part starting with the external nostrils up to the terminal bronchioles constitutes the respiratory or exchange part of the respiratory system. |
| Statement IV: | The alveoli and their ducts form the conducting part of the respiratory system. |
| 1. | Statement I is correct; Statement II is correct; Statement III is correct; Statement IV is correct |
| 2. | Statement I is incorrect; Statement II is incorrect; Statement III is incorrect; Statement IV is incorrect |
| 3. | Statement I is correct; Statement II is correct; Statement III is incorrect; Statement IV is incorrect |
| 4. | Statement I is incorrect; Statement II is incorrect; Statement III is correct; Statement IV is correct |
Subtopic: Â Respiratory System: Trachea & Basic Anatomy of Lung |Â Respiratory Organs |
 81%
Level 1: 80%+
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The thoracic chamber is formed dorsally by:
| 1. | the vertebral column | 2. | the sternum |
| 3. | the ribs | 4. | the dome-shaped diaphragm |
Subtopic: Â Respiratory System: Trachea & Basic Anatomy of Lung |Â Respiratory Organs |
 91%
Level 1: 80%+
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- 1(current)
Q. No.
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