The maximum volume of air a person can breathe in after a forced expiration is known as:
1. Expiratory Capacity
2. Vital Capacity
3. Inspiratory Capacity
4. Total Lung Capacity
Select the correct statement:
1. | Expiration occurs due to external intercostal muscles. |
2. | Intrapulmonary pressure is lower than atmospheric pressure during inspiration. |
3. | Inspiration occurs when atmospheric pressure is less than intrapulmonary pressure. |
4. | Expiration is initiated due to the contraction of the diaphragm. |
Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to:
1. | reduction in the secretion of surfactants by pneumocytes |
2. | benign growth on mucous lining of nasal cavity |
3. | inflammation of bronchi and bronchioles |
4. | proliferation of fibrous tissues and damage of the alveolar walls |
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 |
The majority of carbon dioxide produced by our body cells is transported to the lungs:
1. dissolved in the blood
2. as bicarbonates
3. as carbonates
4. attached to haemoglobin
1. | Inspiratory reserve volume plus tidal volume |
2. | Total lung capacity minus expiratory reserve volume |
3. | Inspiratory reserve volume plus expiratory reserve volume |
4. | Total lung capacity minus residual volume |
The figure given below shows a small part of the human lung where exchange of gases takes place. In which one of the options given below, the one part A, B, C or D is correctly identified along with its function?
1. | A – Alveolar cavity – main site of exchange of respiratory gases |
2. | D – Capillary wall – exchange of O2 and CO2 takes place here |
3. | B – Red blood cell – transport of CO2 mainly. |
4. | C – Arterial capillary – passes oxygen to tissues |
Two friends are eating together at a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of:
1. | diaphragm | 2. | neck |
3. | tongue | 4. | epiglottis |
Which one of the following is the correct statement for respiration in humans?
1. | Cigarette smoking may lead to inflammation of the bronchi |
2. | Neural signals from the pneumotaxic centre in the pons region of the brain can increase the duration of inspiration |
3. | Workers in grinding and stone-breaking industries may suffer from lung fibrosis |
4. | About 90% of carbon dioxide (CO2) is carried by haemoglobin as carbaminohaemoglobin |
The figure shows a diagrammatic view of the human respiratory system with labels A, B, C, and D. Select the option that gives the correct identification, main function, and/or characteristics:
1. | B-pleural membrane- surrounds ribs on both sides to provide cushion against rubbing. |
2. | C-alveoli-thin walled vascular bag-like structures for the exchange of gases. |
3. | D-lower end of the lungs-diaphragm pulls it down during inspiration. |
4. | A trachea-long tube supported by complete cartilaginous rings for conducting inspired air. |