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Q. No.Consider the given two statements:
| Assertion (A): | Alveoli in the human lungs have a large surface area for efficient gas exchange. |
| Reason (R): | There are about 300 million alveoli in both lungs. |
| 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. | (A) is False but (R) is True. |
Subtopic: Respiratory System: Upper Respiratory Tract |
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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: Respiratory System: Trachea & Basic Anatomy of Lung |
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NEET - 2016
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
Consider the given two statements:
| Assertion (A): | The thoracic chamber, being airtight, is critical for breathing. |
| Reason (R): | Movement of rib cage can bring about inhalation and exhalation. |
| 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. | (A) is False but (R) is True. |
Subtopic: Respiratory System: Trachea & Basic Anatomy of Lung |
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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: Respiratory System: Upper Respiratory Tract |
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The heart, trachea, esophagus and associated structures are located in the space between the two lungs called as:
1. mediastinum
2. pleural cavity
3. thoracic cavity
4. parietal cavity
1. mediastinum
2. pleural cavity
3. thoracic cavity
4. parietal cavity
Subtopic: Respiratory System: Trachea & Basic Anatomy of Lung | Respiratory Organs |
From NCERT
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Consider the two statements:
1. Statement I is correct: Statement II is incorrect
2. Statement I is incorrect: Statement II is correct
3. Statement I is correct: Statement II is correct
4. Statement I is incorrect: Statement II is incorrect
| Statement I: | The alveoli have ciliated cells in them to help expel dust particles that make it this far down into the respiratory tract. |
| Statement II: | Gas exchange between the lungs and the blood, and between the blood and tissue fluid, is an active transport process. |
1. Statement I is correct: Statement II is incorrect
2. Statement I is incorrect: Statement II is correct
3. Statement I is correct: Statement II is correct
4. Statement I is incorrect: Statement II is incorrect
Subtopic: Respiratory System: Trachea & Basic Anatomy of Lung |
54%
From NCERT
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Exhalation of air into the lungs can be brought about by:
1. Only I and II
2. Only II
3. Only I and III
4. Only III
| I: | Contraction of diaphragm |
| II: | Contraction of internal intercostal muscles |
| III: | Contraction of external intercostal muscles |
2. Only II
3. Only I and III
4. Only III
Subtopic: Mechanism of Breathing |
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If a person exhales out forcefully by applying all his efforts. What will be the pulmonary volume inhaled by him immediately under normal condition without applying any extra effort?
1. TV + IRV
2. TV only
3. TV + ERV
4. TV+IRV+ ERV
1. TV + IRV
2. TV only
3. TV + ERV
4. TV+IRV+ ERV
Subtopic: Respiratory System: Pulmonary Volumes & Capacities |
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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: Respiratory System: Exchange of Gases |
55%
From NCERT
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Consider the given two statements:
| Assertion (A): | During heavy exercise, hyperventilation occurs to meet the increased oxygen demand. |
| Reason (R): | Hyperventilation increases the removal of CO2 from the blood, thus maintaining the blood pH. |
| 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. | (A) is False but (R) is True. |
Subtopic: Respiratory System: Exchange of Gases |
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