I: | Contraction of diaphragm |
II: | Contraction of internal intercostal muscles |
III: | Contraction of external intercostal muscles |
I: | Oxygen binds with haemoglobin in an irreversible manner to form oxyhaemoglobin. |
II: | Each haemoglobin molecule can carry a maximum of four molecules of O2. |
III: | The binding of oxygen with haemoglobin is primarily related to the partial pressure of O2. |
1. | Total volume of air a person can inspire after a normal expiration. |
2. | Volume of air that will remain in the lungs after a normal expiration. |
3. | Total volume of air a person can expire after a normal inspiration. |
4. | The maximum volume of air a person can breathe in after a forced expiration |
During summer sleep and winter sleep in frogs, the gaseous exchange takes place:
1. Across the alveoli in the lungs.
2. Through the moist buccal mucosa.
3. In the gills.
4. Through the skin.
I: | A resting respiratory rate of 12- 16 breaths per minute. |
II: | A minute ventilation of 6000 – 8000 ml. |
1. | Only I is correct | 2. | Only II is correct |
3. | Both I and II are correct | 4. | Both I and II are incorrect |
1. | pCO2 | 2. | pO2 |
3. | H+ ions | 4. | Temperature |
I: | divides into two principal bronchi at the level of 7th thoracic vertebra. |
II: | is invested by incomplete cartilaginous rings in its wall. |
1. | The diffusing capacity of oxygen is 20 to 25 times higher than the diffusing capacity of carbon dioxide. |
2. | The diffusing capacity of carbon dioxide is 20 to 25 times higher than the diffusing capacity of oxygen. |
3. | The diffusing capacity of oxygen is 200 to 250 times higher than the diffusing capacity of carbon dioxide. |
4. | The diffusing capacity of carbon dioxide is 200 to 250 times higher than the diffusing capacity of oxygen. |