Q. No.The oxy-hemoglobin dissociation curve shifts to the right in all the following conditions except:
1. Presence of 2,3-DPG
2. Increased temperature
3. Increased pH
4. Increased carbon dioxide
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The binding of carbon dioxide to hemoglobin:
I: is related to the partial pressure of carbon dioxide
II: is affected by the partial pressure of oxygen
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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Under normal physiological conditions, the maximum volume of air a person can breathe out after a forced inspiration in a healthy human being is about:
| 1. | 2300 ml | 2. | 3500 ml |
| 3. | 4600 ml | 4. | 5800 ml |
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Branchial respiration is seen in all the following except:
| 1. Aquatic arthropods | 2. Fishes |
| 3. Amphibians like frog | 4. Aquatic mollusks |
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The volume of thoracic chamber in the antero-posterior axis can be increased by:
1. Contraction of diaphragm
2. Relaxation of diaphragm
3. Contraction of external intercostals
4. Contraction of internal intercostals
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The partial pressure of oxygen in oxygenated blood is about:
| 1. 104 mmHg | 2. 100 mmHg |
| 3. 95 mmHg | 4. 40 mmHg |
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Which of the following equations regarding the calculation of pulmonary capacities would be correct?
| 1. IC = IRV – TV | 2. EC = VC – IRV |
| 3. VC = ERV + IRV | 4. TLC = VC – RV |
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The formation of oxy-hemoglobin at the alveoli is favored by all the following except:
| 1. High pO2 | 2. Low pCO2 |
| 3. Lower H+ ion concentration | 4. Higher temperature |
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The sum of expiratory reserve volume [ERV] and residual volume [RV] corresponds to:
| 1. Expiratory capacity | 2. Vital capacity |
| 3. Functional residual capacity | 4. Total lung capacity |
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The major mode of transport of carbon dioxide in human body is:
| 1. | in combination with hemoglobin |
| 2. | in dissolved state in plasma |
| 3. | as carboxyhemoglobin |
| 4. | as bicarbonate |
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