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Q. No.In the regulation of respiration, a chemosensitive area adjacent to the rhythm centre in the medulla region of the brain, is highly sensitive to:
1. \(HCO^-_3\)
2. \(CO_2\)
3. \(O_2\)
4. \(N_2\)
1. \(HCO^-_3\)
2. \(CO_2\)
3. \(O_2\)
4. \(N_2\)
Subtopic: Respiratory System: Regulation of Respiration |
80%
Level 1: 80%+
NEET - 2022
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When you take a deep breath, your stomach moves out because
1. swallowing air increases the volume of the thoracic cavity
2. your stomach shouldn’t move out when you take a deep breath because you want the volume of your chest cavity to increase, not your abdominal cavity
3. contracting your abdominal muscles pushes your stomach out, generating negative pressure in your lungs.
4. when your diaphragm contracts, it moves down, pressing your abdominal cavity out.
1. swallowing air increases the volume of the thoracic cavity
2. your stomach shouldn’t move out when you take a deep breath because you want the volume of your chest cavity to increase, not your abdominal cavity
3. contracting your abdominal muscles pushes your stomach out, generating negative pressure in your lungs.
4. when your diaphragm contracts, it moves down, pressing your abdominal cavity out.
Subtopic: Respiratory System: Exchange of Gases |
Level 3: 35%-60%
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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)
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)
Subtopic: Respiratory System: Exchange of Gases |
76%
Level 2: 60%+
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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 |
88%
Level 1: 80%+
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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 |
74%
Level 2: 60%+
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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%
Level 2: 60%+
NEET - 2022
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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%
Level 1: 80%+
NEET - 2022
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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?
1. Only I, II and III
2. Only I, III and IV
3. Only II, III and IV
4. I, II, III and IV
| 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%
Level 3: 35%-60%
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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: Respiratory System: Pulmonary Ventilation |
58%
Level 3: 35%-60%
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The figure shows pulmonary volumes as measured on a spirometer. Which of the following will be true?
| I: | A+B = Inspiratory Reserve Volume |
| II: | C+D = Functional Residual Capacity |
| III: | B+C = Tidal Volume |
| IV: | [(A+B+C+D) – (A+B+C)] = Residual Volume |
2. Only II and IV are correct
3. Only I and III are correct
4. I, II, III and IV are correct
Subtopic: Respiratory System: Pulmonary Volumes & Capacities |
68%
Level 2: 60%+
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