Q. No.Pressure gradient between the lungs and atmosphere is maintained by
1.
diaphragm
2.
external intercostal muscles
3.
internal intercostal muscles
4.
All of these
Which of the following events happen when air enters lungs
| 1. | Ribs and sternum raised |
| 2. | volume of thorax increased |
| 3. | Diaphragm contracted |
| 4. | All of the above |
Which of the following volume of air cannot be measured by respirometer?
| 1. | IRV | 2. | ERV |
| 3. | RV | 4. | Both A and B |
Volume of air which does not participate in gaseous exchange is
| 1. | Residual volume | 2. | Dead space air |
| 3. | Tidal volume | 4. | Both A and B |
The volume of air expired normally after forceful inspiration
(1)TV+ IRV
(2)TV+ERV
(3)TV
(4)None of these
The volume of air expired forcefully after normal inspiration
| 1. | TV+ IRV | 2. | TV+ERV |
| 3. | TV | 4. | None of these |
Most of the aquatic arthropods respire through:
1. diffusion over entire body surface
2. gills
3. tracheae and tracheoles
4. skin
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 |
Which of the following will not be equal in normal physiological conditions?
| 1. | Partial pressure of oxygen in deoxygenated blood and partial pressure of oxygen in tissues |
| 2. | Partial pressure of carbon dioxide in alveoli and partial pressure of carbon dioxide in oxygenated blood |
| 3. | Partial pressure of oxygen in oxygenated blood and partial pressure of oxygen in alveoli |
| 4. | Partial pressure of carbon dioxide in tissues and partial pressure of carbon dioxide in deoxygenated blood |
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