Which of the following is true
| 1. | Gills are used by most of the aquatic animals |
| 2. | lungs are used by most of the terrestrial animals |
| 3. | Mammals have a well developed respiratory system |
| 4. | All of the above |
| 1. | Rate of diffusion by increasing surface area |
| 2. | Diffusion distance |
| 3. | Air turbulence |
| 4. | Dead space |
The mechanism of breathing depends on animal’s
| 1. | habitat |
| 2. | level of organisation |
| 3. | Both 1 and 2 |
| 4. | Body segmentation |
Which of the following is not a function of the nasal cavity in humans?
1. Filteration of the air
2. Humidification of the air
3. Warming of the air
4. Removal of carbon dioxide from the air
Which of the following is the function of the conducting part of the respiratory system?
| 1. | clears the foreign particle |
| 2. | humidifies air |
| 3. | brings air to body temperature |
| 4. | All of these |
Trachea divides at the level of ______thoracic vertebra into left and right primary bronchi
| 1. | 5th | 2. | 6th |
| 3. | 10th | 4. | 4th |
Lungs are covered by a double layered membrane which is called
| 1. | Pleural membrane | 2. | visceral membrane |
| 3. | pulmonary membrane | 4. | parietal membrane |
| Structure | Function | ||
| (A) | Alveoli | (1) | Sound production |
| (B) | Trachea | (2) | Gas exchange |
| (C) | Larynx | (3) | Transport of air |
| (D) | Diaphragm | (4) | Increase thoracic volume during inspiration |
How many external nostrils are present in human beings
| 1. | 1 | 2. | 2 |
| 3. | 3 | 4. | None of these |
Which of the following is part of the thoracic chamber?
| 1. | ribs and vertebral column | 2. | diaphragm |
| 3. | sternum | 4. | All of the above |