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Q. No.Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because?
1.
there is a negative pressure in the lungs
2.
there is a negative intrapleural pressure pulling at the lung walls
3.
there is a positive intrapleural pressure
4.
pressure in the lungs is higher than the atmospheric pressure
Subtopic: Â Respiratory System: Trachea & Basic Anatomy of Lung |
 58%
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NEET - 2016
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Consider the following statements:
| I: | The diffusing capacity of CO2 across the respiratory membrane is higher than that of O2 |
| II: | The presence of Hb increases the efficiency of O2 transport by about 10 times. |
| III: | Carbon monoxide binds to Hb with much more tenacity with respect to O2 |
Which of the above statements are true?
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II, and III |
Subtopic: Â Respiratory System: Exchange of Gases |
From NCERT
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Branchial respiration is seen in all the following except:
| 1. Aquatic arthropods | 2. Fishes |
| 3. Amphibians like frog | 4. Aquatic mollusks |
Subtopic: Â Respiratory System: Trachea & Basic Anatomy of Lung |
 57%
From NCERT
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A condition in which a person's airways become inflamed, narrow, swell and produce extra mucus, which makes it difficult to breathe is known as
| 1. | Asthma |
| 2. | Emphysema |
| 3. | Chronic bronchitis |
| 4. | Chronic obstructive pulmonary disease |
Subtopic: Â Respiratory Disorders: Part 1 |Â Respiratory Disorders: Part 2 |
 62%
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In the given diagram of the oxygen dissociation curve, under normal physiological conditions, the partial pressure of oxygen at the tissue level is represented by :
1. A
2. B
3. C
4. D
Subtopic: Â Respiratory System: Transport of Gases Part 1 |Â Respiratory System: Transport of Gases Part 2 |Â Respiratory System: Transport of Gases |
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At 40 mmHg of partial pressure of oxygen haemoglobin is ______ saturated
1. 50 %
2. 75 %
3. 85 %
4. 35 %
Subtopic: Â Respiratory System: Transport of Gases Part 1 |
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At 40 mm Hg partial pressure of oxygen, the percentage saturation of haemoglobin with oxygen is expected to be about:
1. 50 %
2. 75 %
3. 95 %
4. 99 %
1. 50 %
2. 75 %
3. 95 %
4. 99 %
Subtopic: Â Respiratory System: Exchange of Gases |
 57%
From NCERT
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Under normal physiological conditions, what percent of haemoglobin is saturated with oxygen when the partial pressure of oxygen is 40 mm Hg?
1. 50
2. 75
3. 90
4. 98
1. 50
2. 75
3. 90
4. 98
Subtopic: Â Respiratory System: Transport of Gases |
 60%
From NCERT
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Given below are two statements:
| Assertion (A): | The part of the respiratory system starting with the external nostrils upto terminal bronchioles constitutes the conducting part, whereas the alveoli from respiratory part. |
| Reason (R): | Conducting part transports the atmospheric air to alveoli, clears it from foreign particles, humidifies it and also brings the air to body temperature. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Respiratory System: Upper Respiratory Tract |
From NCERT
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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: | Each haemoglobin molecule can carry a maximum of four molecules of O2. |
| Statement II: | Hemoglobin can bind to four molecules of CO2. |
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: Transport of Gases |
From NCERT
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