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Q. No.A:
In mammals –ve pressure breathing takes place.
R:
Inspiration can occurs if the transpulmonary pressure is less than the atmospheric
pressurea
In the following questions a statement of assertion
(A) is followed by a statement of reason (R).
1. If both Assertion &
Reason are true and the reason is the correct explanation of the assertion, then
mark (1)
2. If both Assertion & Reason are true but the reason is not
the correct explanation of the assertion, then mark (2)
3. If Assertion
is true statement but Reason is false, then mark (3)
4. If both Assertion
and Reason are false statements, then mark (4)
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Respiratory System: Exchange of Gases |
77%
From NCERT
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Haldane effect explain –
1. Decrease in affinity of haemoglobin for oxygen due to presence of 2, 3 DGP
2. Increased ability of oxy-haemoglobin to take up more CO2 as bicarbonate
3. Increased ability of reduced haemoglobin to take up more CO2 as bicarbonate and cabamino form.
4. Dissociation of O2 from oxy-haemoglobin.
1. Decrease in affinity of haemoglobin for oxygen due to presence of 2, 3 DGP
2. Increased ability of oxy-haemoglobin to take up more CO2 as bicarbonate
3. Increased ability of reduced haemoglobin to take up more CO2 as bicarbonate and cabamino form.
4. Dissociation of O2 from oxy-haemoglobin.
Subtopic: Respiratory System: Transport of Gases |
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Hints
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
A: Even the cartilaginous ring is absent in respiratory bronchiole, it does not collapse during rapid expiration.
R: Respiratory bronchiole is lined with few surfactant releasing cells
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
A: Even the cartilaginous ring is absent in respiratory bronchiole, it does not collapse during rapid expiration.
R: Respiratory bronchiole is lined with few surfactant releasing cells
Subtopic: Respiratory System: Upper Respiratory Tract | Respiratory System: Exchange of Gases |
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A decrease in the pH of human blood caused by exercise would
1. decrease breathing rate
2. increase heart rate
3. decrease the amount of O2 unloaded form hemoglobin
4. decrease cardiac output
1. decrease breathing rate
2. increase heart rate
3. decrease the amount of O2 unloaded form hemoglobin
4. decrease cardiac output
Subtopic: Respiratory System: Pulmonary Volumes & Capacities | Respiratory System: Exchange of Gases |
58%
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Which of the following is not involved in speeding up breathing?
1. signals from the aorta to the medulla in response to low blood pH.
2. stretch receptors in the lungs
3. impulses from the breathing centers in the medulla
4. severe deficiencies of oxygen
1. signals from the aorta to the medulla in response to low blood pH.
2. stretch receptors in the lungs
3. impulses from the breathing centers in the medulla
4. severe deficiencies of oxygen
Subtopic: Respiratory System: Regulation of Respiration |
52%
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Values of partial pressure of oxygen and carbon dioxide in alveolar air are 104 mm Hg and 40 mm Hg respectively. Similar values in the venous blood are:
1. 104 mm Hg and 40 mm Hg
2. 40 mm Hg and 45 mm Hg
3. 46 mm Hg and 37 mm Hg
4. 120 mm Hg and 60 mm Hg
1. 104 mm Hg and 40 mm Hg
2. 40 mm Hg and 45 mm Hg
3. 46 mm Hg and 37 mm Hg
4. 120 mm Hg and 60 mm Hg
Subtopic: Respiratory System: Exchange of Gases |
87%
From NCERT
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Arrange in the correct sequence in respect of respiration:
Choose the correct answer from the options given below:
1. A > B > C > D > E
2. A > C > D > B > E
3. D > B > C > E > A
4. A > D > C > B > E
| A. | Breathing or pulmonary ventilation by which air is drawn in and CO2 rich air is released out |
| B. | Diffusion of O2 and CO2 between blood and tissue |
| C. | Transport of gases by the blood |
| D. | Diffusion of O2 and CO2 across alveolar membrane |
| E. | Utilization of O2 by the cells for catabolic reactions and resultant release of CO2 |
1. A > B > C > D > E
2. A > C > D > B > E
3. D > B > C > E > A
4. A > D > C > B > E
Subtopic: Respiratory System: Pulmonary Ventilation |
73%
From NCERT
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Which of the following statements are correct with respect to vital capacity?
Choose the most appropriate answer from the options given below:
| (a) | It includes ERV, TV and IRV |
| (b) | Total volume of air a person can inspire after a normal expiration |
| (c) | The maximum volume of air a person can breathe in after forced expiration |
| (d) | It includes ERV, RV and IRV. |
| (e) | The maximum volume of air a person can breathe out after a forced inspiration. |
| 1. | (b), (d) and (e) | 2. | (a), (c) and (d) |
| 3. | (a), (c) and (e) | 4. | (a) and (e) |
Subtopic: Respiratory System: Pulmonary Volumes & Capacities |
74%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
Identify the region of human brain which has pneumotaxic centre that alters respiratory rate by reducing the duration of inspiration.
| 1. | Medulla | 2. | Pons |
| 3. | Thalamus | 4. | Cerebrum |
Subtopic: Respiratory System: Regulation of Respiration |
85%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
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: Respiratory System: Trachea & Basic Anatomy of Lung |
53%
From NCERT
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NEET 2025 - Target Batch
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