Q. No.| 1. | IRV + ERV + TV | 2. | IRV + ERV |
| 3. | IRV + ERV + TV + RV | 4. | IRV + ERV + TV - RV |
| A. | Diffusion of gases (O2 and CO2) across alveolar membrane. |
| B. | Diffusion of O2 and CO2 between blood and tissues |
| C. | Transport of gases by the blood |
| D. | Pulmonary ventilation by which atmospheric air is drawn in and CO2 rich alveolar air is released out. |
| E. | Utilisation of O2 by the cells for catabolic reactions and resultant release of CO2 |
Choose the correct answer from the options given below:
| 1. | (D), (A), (C), (B), (E) | 2. | (C), (B), (A), (E), (D) |
| 3. | (B), (C), (E), (D), (A) | 4. | (A), (C), (B), (E), (D) |
Under normal physiological conditions in human being every 100 ml of oxygenated blood can deliver _____________ml of O2 to the tissues.
1. 10 ml
2. 2 ml
3. 5 ml
4. 4 ml
| 1. | Provides surface for diffusion of O2 and CO2 |
| 2. | It clears inhaled air from foreign particles |
| 3. | Inhaled air is humidified |
| 4. | Temperature of inhaled air is brought to body temperature |
Which of the following disorders represents decrease in respiratory surface due to damaged alveolar walls?
1. Hypocapnia
2. Bronchitis
3. Asthma
4. Emphysema
In the regulation of respiration, a chemosensitive area adjacent to the rhythm centre in the medulla region of the brain, is highly sensitive to:
1. \(HCO^-_3\)
2. \(CO_2\)
3. \(O_2\)
4. \(N_2\)
| a. | It includes ERV, TV and IRV |
| b. | Total volume of air a person can inspire after a normal expiration |
| c. | The maximum volume of air a person can breathe in after forced expiration |
| d. | It includes ERV, RV and IRV. |
| e. | The maximum volume of air a person can breathe out after a forced inspiration. |
Choose the most appropriate answer from the options given below:
1. (b), (d) and (e)
2. (a), (c) and (d)
3. (a), (c) and (e)
4. (a) and (e)
1. Medulla
2. Pons
3. Thalamus
4. Cerebrum
The partial pressures (in mm Hg) of oxygen (O2) and carbon dioxide (CO2) at alveoli (the site of diffusion) are :
1. pO2=95 and pCO2 = 40
2. pO2 = 159 and pCO2 =0.3
3. pO2 = 104 and pCO2=40
4. pO2 = 40 and pCO2=45
Select the favorable conditions required for the formation of oxyhemoglobin at the alveoli.
1. High pO2, high pCO2, less H+, higher temperature
2. Low pO2, low pCO2, more H+, higher temperature
3. High pO2, low pCO2, less H+, lower temperature
4. Low pO2 high pCO2 more H+, higher temperature
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