Select Question Set:
Q. No.The given figure shows the diagrammatic view of human respiratory system (sectional view of the left lung is also shown). Regarding the parts labelled as P, Q, R and S, which of the following statements are true?
I:
P is an incomplete cartilaginous ring seen only in trachea and principal bronchus.
II:
Q is the point where the trachea divides into a right and left primary bronchus and corresponds to the level of 5th thoracic vertebra.
III:
R shows the double-layered pleura where the outer pleural membrane is in close contact with the thoracic lining.
IV:
S is pleural cavity with minimal amount of pleural fluid which reduces friction on the lung surface.
1. Only I, II and III
2. Only I, III and IV
3. Only II, III and IV
4. I, II, III and IV
Subtopic: Â Respiratory System: Trachea & Basic Anatomy of Lung |
 53%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
The figure shows the events happening during the inhalation and exhalation phases of pulmonary ventilation. Read the two given statements carefully.
| I: | A shows the inhalation phase brought about by the contraction of diaphragm that increases the volume of thorax in antero-posterior axis and by the contraction of external intercostal muscle that increases the volume of thorax in dorso-ventral axis. |
| II: | B shows the exhalation phase brought about by the relaxation of diaphragm that decreases the volume of thorax in antero-posterior axis and by the contraction of internal intercostal muscle that decreases the volume of thorax in dorso-ventral axis. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Â Respiratory System: Pulmonary Ventilation |
 58%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
A person has the following values of respiratory volumes:
His functional residual capacity and vital capacity respectively are:
1. 2000 ml and 3900 ml
2. 2000 ml and 4900 ml
3. 1400 ml and 3900 ml
4. 1400 ml and 4900 ml
| Tidal Volume | 400 ml |
| Expiratory reserve volume | 1000 ml |
| Inspiratory reserve volume | 2500 ml |
| Residual volume | 1000 ml |
1. 2000 ml and 3900 ml
2. 2000 ml and 4900 ml
3. 1400 ml and 3900 ml
4. 1400 ml and 4900 ml
Subtopic: Â Respiratory System: Pulmonary Volumes & Capacities |
 72%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Lower invertebrates like sponges, coelenterates, flatworms, etc., exchange O2 with CO2 by simple diffusion:
1. conducted to and from the tissues by a network of tubes.
2. over their entire body surface.
3. using their moist cuticle.
4. across the gills.
1. conducted to and from the tissues by a network of tubes.
2. over their entire body surface.
3. using their moist cuticle.
4. across the gills.
Subtopic: Â Respiratory Organs |
 90%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
A healthy man can inspire or expire approximately:
1. 500 mL of air per minute.
2. 2500 to 3000 mL of air per minute.
3. 1000 mL to 1100 mL per minute.
4. 6000 to 8000 mL of air per minute.
1. 500 mL of air per minute.
2. 2500 to 3000 mL of air per minute.
3. 1000 mL to 1100 mL per minute.
4. 6000 to 8000 mL of air per minute.
Subtopic: Â Respiratory System: Trachea & Basic Anatomy of Lung |Â Respiratory System: Pulmonary Volumes & Capacities |
 77%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Volume of air that will remain in the lungs after a normal expiration averages:
1. 1000 mL to 1100 mL.
2. 2100 mL to 2300 mL.
3. 1100 mL to 1200 mL.
4. 2500 mL to 3000 mL.
1. 1000 mL to 1100 mL.
2. 2100 mL to 2300 mL.
3. 1100 mL to 1200 mL.
4. 2500 mL to 3000 mL.
Subtopic: Â Respiratory System: Pulmonary Volumes & Capacities |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Consider the given two statements:
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | The partial pressure of oxygen is equal in alveoli and oxygenated blood. |
| Statement II: | The partial pressure of carbon dioxide is equal in alveoli and deoxygenated blood. |
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Â Respiratory System: Exchange of Gases |
 73%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Consider the given two statements:
| Assertion (A): | O2 gets bound to haemoglobin in the lung surface and gets dissociated at the tissues. |
| Reason (R): | In the alveoli, there is high pO2, low pCO2, lesser H+ concentration and lower temperature whereas in the tissues, low pO2, high pCO2, high H+ concentration and higher temperature exist. |
| 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 |
Subtopic: Â Respiratory System: Pulmonary Ventilation |Â Respiratory System: Exchange of Gases |Â Respiratory System: Regulation of Respiration |
 86%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
At about what partial pressure of oxygen [mm Hg] is the haemoglobin in blood 50% saturated?
| 1. | 95 | 2. | 75 |
| 3. | 27 | 4. | 15 |
Subtopic: Â Respiratory System: Transport of Gases |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
In tissues:
1. a and b are correct
2. a and d are correct
3. b and c are correct
4. c and d are correct
| a. | pCO2 is high and pO2 is low |
| b. | dissociation of CO2 from carbamino-haemoglobin takes place |
| c. | pCO2 is low and pO2 is high |
| d. | more binding of carbon dioxide to haemoglobin occurs |
1. a and b are correct
2. a and d are correct
3. b and c are correct
4. c and d are correct
Subtopic: Â Respiratory System: Exchange of Gases |
 84%
Please attempt this question first.
Hints
Select Question Set:
© 2025 GoodEd Technologies Pvt. Ltd.