| 1 |
Breakdown of Alveoli of lungs is called. |
- A. Asthma
- B. Lungs cancer
- C. Emphysema
- D. Tuberculosis
|
| 2 |
Air spaces between mesophyll cells of a leaf comprise ______ of the total volume |
- A. 20%
- B. 30%
- C. 40%
- D. 50%
|
| 3 |
The main site of exchange of gases iin plants are |
- A. Cuticle
- B. Lenticel
- C. Stomata
- D. Epidermis
|
| 4 |
Emphysema is the breakdown of |
- A. Trachea
- B. Bronchi
- C. Alveoli
- D. Bronchioles
|
| 5 |
Oxygen content of fresh air are |
- A. 200 ml/litre
- B. 10 ml/ litre
- C. 100 ml / litre
- D. 150 ml / litre
|
| 6 |
100 ml of arterial blood of human being contains CO2 |
- A. 50 ml
- B. 54 ml
- C. 56 ml
- D. 58 ml
|
| 7 |
How many molecule of oxygen can bind with a molecule of myoglobin. |
|
| 8 |
During breathing no stale of air remains in the lungs of. |
- A. Mammals
- B. Amphibian
- C. Birds
- D. Sarracenia
|
| 9 |
_____ is more important regulator of breathing process. |
- A. Oxygen
- B. Carbon di oxide
- C. Myoglobin
- D. Hemoglobin
|
| 10 |
Pleura is double layered thin membrane that covers. |
- A. Heart
- B. Liver
- C. Lungs
- D. Kidneys
|