Q. No.
Read the following steps and arrange them in correct sequence for the process of inspiration:
| A. | Increases thoracic volume |
| B. | Air moves into lungs |
| C. | The contraction in diaphragm and EICM |
| D. | Increases pulmonary volume |
| E. | Lungs expand |
| F. | Decreases the pulmonary pressure (IPP) |
| 1. | A, B, C, D, E, F | 2. | C, D, A, E, F, B |
| 3. | C, A, E, D, F, B | 4. | C, E, D, A, F, B |
By the contraction in radial muscle of diaphragm it become flattened in shape, so, volume of thoracic cavity increases in :-
| 1. | Anterior-posterior axis | 2. | Dorsal-ventral axis |
| 3. | Anterior-lateral axis | 4. | Dorsal-lateral axis |
Every 2000 mL of deoxygenated blood delivers approximately, how much mL CO to alveoli?
1. 4 mL
2. 4.2 mL
3. 8 mL
4. 80 mL
The amount of air that enters the lungs during normal, restful breathing is called the______.
| 1. | Vital capacity | 2. | Tidal volume |
| 3. | Total lung capacity | 4. | Expiratory reserve volume |
'Chemosensitive Area' for regulation of respiration is present on ?
| 1. | Medulla | 2. | Pons |
| 3. | Cerebrum | 4. | Cerebellum |
Why the partial pressure of \(CO_2\) is high at tissue-site?
| 1. | Due to the saturation of \(O_2~\) with Hb |
| 2. | Release of \(H^+~\) at the tissue site |
| 3. | Due to metabolism |
| 4. | Due to the dissociation of |
The partial pressure of \(O_2\) and \(CO_2\) in the arterial blood respectively is
| 1. | 40 mmHg and 45 mmHg |
| 2. | 100 mmHg and 45 mmHg |
| 3. | 95 mmHg and 40 mmHg |
| 4. | 45 mmHg and 40 mmHg |
The partial pressure of carbon dioxide in the pulmonary artery is
| 1. | More than that in tissues |
| 2. | Equal to that in systemic arteries |
| 3. | Less than that in alveoli |
| 4. | Equal to that in the systemic vein |
Emphysema is a chronic disorder, it leads to
| 1. | Loss of elasticity of walls of bronchioles and alveoli |
| 2. | Surface area of exchange of gases is increased |
| 3. | Alveolar sacs become empty even after expiration |
| 4. | Exhalation becomes easier during inflation of lungs |
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