MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Right comparison of partial pressure of oxygen and partial pressure of carbon dioxide in the atmospheric air than in alveolar air is _________ |
| A. | partial pressure of oxygen lesser, partial pressure of carbon dioxide higher |
| B. | partial pressure of oxygen higher, partial pressure of carbon dioxide lesser |
| C. | partial pressure of oxygen lesser, partial pressure of carbon dioxide higher |
| D. | partial pressure of oxygen lesser, partial pressure of carbon dioxide lesser |
| Answer» C. partial pressure of oxygen lesser, partial pressure of carbon dioxide higher | |
| 2. |
What is the partial pressure of carbon dioxide in alveolar air and in deoxygenated blood respectively? |
| A. | 50 mm Hg, 45 mm Hg |
| B. | 104 mm Hg, 45 mm Hg |
| C. | 45 mm Hg, 40 mm Hg |
| D. | 40 mm Hg, 45 mm Hg |
| Answer» E. | |
| 3. |
Carbon dioxide is _______ times more soluble than oxygen. |
| A. | 20-25 |
| B. | 5-10 |
| C. | 15-20 |
| D. | 25-30 |
| Answer» B. 5-10 | |
| 4. |
Which one of the following does not consist diffusion membrane? |
| A. | Thin squamous epithelium of alveoli |
| B. | Cuboidal epithelium of alveoli |
| C. | Basement membrane |
| D. | Endothelium of blood capillaries |
| Answer» C. Basement membrane | |
| 5. |
On which of the following factors diffusion does not depend? |
| A. | Solubility of gases |
| B. | Thickness of the respiratory membrane |
| C. | Partial pressure difference |
| D. | Molecular weight of gases |
| Answer» E. | |
| 6. |
Partial pressure of oxygen in alveolar air is ________ |
| A. | 159 mm Hg |
| B. | 90 mm Hg |
| C. | 104 mm Hg |
| D. | 45 mm Hg |
| Answer» D. 45 mm Hg | |
| 7. |
What is the concentration of oxygen in expired air? |
| A. | 19% |
| B. | 4% |
| C. | 10% |
| D. | 16% |
| Answer» E. | |
| 8. |
Solubility of carbon dioxide is ________ than oxygen. |
| A. | more |
| B. | less |
| C. | 50 times more |
| D. | equal |
| Answer» B. less | |
| 9. |
What is the primary site for exchange of gases in lungs? |
| A. | Larynx |
| B. | Trachea |
| C. | Alveoli |
| D. | Bronchi |
| Answer» D. Bronchi | |
| 10. |
Gaseous exchange is held by ________ |
| A. | osmosis |
| B. | simple diffusion |
| C. | facilitated diffusion |
| D. | co-transport |
| Answer» C. facilitated diffusion | |