Q. No.| A. | Diffusion of gases across alveolar membrane |
| B. | Diffusion of gases between blood and tissues |
| C. | Transport of gases by blood |
| D. | Utilisation of \(O_2\) by the cells for catabolic reactions |
| E. | Breathing or pulmonary ventilation |
| 1. | A →E→B→C→D | 2. | C →E→A→B→D |
| 3. | B →D→C→E→A | 4. | E →A→C→B→D |
Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because?
| 1. | there is a negative pressure in the lungs |
| 2. | there is a negative intrapleural pressure pulling at the lung walls |
| 3. | there is a positive intrapleural pressure |
| 4. | pressure in the lungs is higher than the atmospheric pressure |
Select the correct events that occur during inspiration.
(a) Contraction of diaphragm
(b) Contraction of external inter-costal muscles
(c) Pulmonary volume decreases
(d) Intra pulmonary pressure increases
| 1. | (c) and (d) | 2. | (a), (b) and (d) |
| 3. | only (d) | 4. | (a) and (b) |
The Total Lung Capacity (TLC) is the total volume of air accommodated in the lungs at the end of forced inspiration.
This includes:
| 1. | RV; IC (Inspiratory Capacity); EC (Expiratory Capacity); and ERV |
| 2. | RV; ERV; IC and EC |
| 3. | RV; ERV; VC (Vital Capacity) and FRC (Functional Residual Capacity) |
| 4. | RV (Residual Volume); ERV (Expiratory Reserve Volume); TV (Tidal Volume); and IRV (Inspiratory Reserve Volume) |
Tidal Volume and Expiratory Reserve Volume of an athlete is 500 mL and 1000 mL respectively. What will be his Expiratory Capacity if the Residual Volume is 1200 mL?
| 1. | 2700 mL | 2. | 1500 mL |
| 3. | 1700 mL | 4. | 2200 mL |
Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of:
1. Inspiratory Reserve Volume
2. Tidal Volume
3. Expiratory Reserve Volume
4. Residual Volume
The partial pressure of oxygen in the alveoli of the lungs is:
1. equal to that in the blood
2. more than that in the blood
3. less than that in the blood
4. less than that of carbon dioxide
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. | reduce the blood supply to the brain |
| 2. | decrease the affinity of hemoglobin with oxygen |
| 3. | lead to release of bicarbonate ions by the liver |
| 4. | reduce the rate of heartbeat |
Approximately seventy percent of carbon dioxide absorbed by the blood will be transported to the lungs:
| 1. | as bicarbonate ions |
| 2. | in the form of dissolved gas molecules |
| 3. | by binding to R.B.C |
| 4. | as carbamino-haemoglobin |
© 2025 GoodEd Technologies Pvt. Ltd.