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Q. No.Residual volume in lungs:
I:
Prevents Lung Collapse
II:
Facilitates Gas Exchange
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 Volumes & Capacities |
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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: Â Respiratory System: Trachea & Basic Anatomy of Lung |
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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: Â Mechanism of Breathing |
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The respiratory rhythm center:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | is located in the medulla oblongata. |
| II: | regulates the duration of inhalation and increases respiratory rate. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Â Respiratory System: Regulation of Respiration |
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At the alveolar site, the reaction catalyzed by carbonic anhydrase moves in the direction of:
1. Formation of \(HCO^-_3\)and \(H^+\)
2. Formation of \(CO_2\) and \(H_2O\)
3. Binding of \(O_2\) to \(CO_2\)
4. Dissociation of \(CO_2\) into carbon and oxygen
1. Formation of \(HCO^-_3\)and \(H^+\)
2. Formation of \(CO_2\) and \(H_2O\)
3. Binding of \(O_2\) to \(CO_2\)
4. Dissociation of \(CO_2\) into carbon and oxygen
Subtopic: Â Respiratory System: Transport of Gases |
 61%
From NCERT
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Gas exchange between the blood and tissues occurs:
1. throughout the circulatory system.
2. in the arteries, arterioles and capillaries.
3. in the systemic arteries only.
4. in the capillaries only.
1. throughout the circulatory system.
2. in the arteries, arterioles and capillaries.
3. in the systemic arteries only.
4. in the capillaries only.
Subtopic: Â Respiratory System: Exchange of Gases |
 55%
From NCERT
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Which of the following will most likely occur during heavy exercise?
| 1. | Blood pH will decrease in the active tissues. |
| 2. | Less oxygen will be delivered to the tissues due to increased cardiac contractions resulting in increased blood velocity. |
| 3. | Capillmies surrounding contracting skeletal muscles will constrict to allow increased freedom of movement. |
| 4. | The respiratory system will deliver less nitrogen to the blood. |
Subtopic: Â Respiratory System: Transport of Gases |
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Carbon dioxide partial pressure:
| 1. | increases in the blood as it travels from the systemic venules to the inferior vena cava. |
| 2. | increases in the blood as it travels from the pulmonary arteries to the pulmonary veins. |
| 3. | is greater in the blood in the systemic capillary beds than in the alveoli of the lungs. |
| 4. | is greater in the blood in the systemic capillary beds than in the systemic tissues. |
Subtopic: Â Respiratory System: Exchange of Gases |
 59%
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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 respiratory membrane has one layer - the simple squamous epithelium of the alveoli. |
| Statement II: | Oxygen diffuses faster from carbon dioxide across the respiratory membrane. |
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: Â Respiratory System: Exchange of Gases |
 62%
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: | Carbon dioxide and oxygen compete for binding sites with the hemoglobin. |
| Statement II: | Oxygen dissociates faster from hemoglobin during exercise. |
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: Â Respiratory System: Exchange of Gases |Â Respiratory System: Transport of Gases |
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