Assertion (A): | Relaxation of the diaphragm and the inter-costal muscles brings about inspiration. |
Reason (R): | Relaxation of the diaphragm and the inter-costal muscles leads to an increase in intra-pulmonary pressure to slightly above the atmospheric pressure. |
1. | Both (A) and (R) are True and (R) correctly explains (A) |
2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
3. | (A) is True but (R) is False |
4. | (A) is False but (R) is True |
Statement I: | Expiratory Capacity is the total volume of air a person can expire after a normal inspiration. |
Statement II: | Functional Residual Capacity is the volume of air that will remain in the lungs after a forceful maximal expiration. |
I: | The maximum volume of air a person can breathe in after a normal expiration. |
II: | The maximum volume of air a person can breathe out after a normal inspiration. |
1. | Atmospheric air → Oxygenated blood → Alveoli → Tissues |
2. | Alveoli → Atmospheric air → Oxygenated blood → Tissues |
3. | Atmospheric air → Alveoli → Oxygenated blood → Tissues |
4. | Alveoli → Atmospheric air → Oxygenated blood → Deoxygenated blood |
Statement I: | Each haemoglobin molecule can carry a maximum of four molecules of O2. |
Statement II: | Hemoglobin can bind to four molecules of CO2. |