Q. No.Match the Following Columns.
| Column I | Column II | ||
| A | Earthworm | 1. | Moist Cuticle |
| B | Aquatic arthropods | 2. | Gills |
| C | Fishes | 3. | Lungs |
| D | Birds/Reptiles | 4. | Trachea |
Codes
| A | B | C | D | |
| 1. | 2 | 1 | 4 | 3 |
| 2. | 1 | 4 | 2 | 3 |
| 3. | 1 | 3 | 2 | 4 |
| 4. | 1 | 2 | 4 | 3 |
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 |
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. |
A person suffers punctures in his chest cavity in an accident, without any damage to the lungs, its effect could be
1. reduced breathing rate
2. rapid increase in breathing rate
3. no change in respiration
4. cessation of breathing
Which of the following does not occur during breathing?
1. Brings the air to body temperature
2. Warms up the air
3. Diffusion of gases
4. Cleans up the air
Mark the correct pair of muscles involved in the normal breathing in
humans.
1. External and internal intercostal muscles
2. Diaphragm and abdominal muscles
3. Diaphragm and external intercostal muscles
4. Diaphragm and intercostal muscles
| 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
| (A) | Diffusion of gases (O2 and CO2) across alveolar membrane. |
| (B) | Diffusion of O2 and CO2 between blood and tissues |
| (C) | Transport of gases by the blood |
| (D) | Pulmonary ventilation by which atmospheric air is drawn in and CO2 rich alveolar air is released out. |
| (E) | Utilisation of O2 by the cells for catabolic reactions and resultant release of CO2 |
| 1. | (D), (A), (C), (B), (E) | 2. | (C), (B), (A), (E), (D) |
| 3. | (B), (C), (E), (D), (A) | 4. | (A), (C), (B), (E), (D) |
| 1. | Provides surface for diffusion of O2 and CO2 |
| 2. | It clears inhaled air from foreign particles |
| 3. | Inhaled air is humidified |
| 4. | Temperature of inhaled air is brought to body temperature |
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)
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