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Q. No.Given below are two statements:
Assertion (A):
Exposure to small concentrations of CO hinder the ability of Hb to deliver oxygen to the body.
Reason (R):
Carboxyhemoglobin \([HbCO]\) forms more readily than does oxyhemoglobin \((HbO_2).\)
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: Exchange of Gases |
78%
Level 2: 60%+
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | Oxidized hemoglobin carries maximum oxygen in the human blood. |
| Reason (R): | Oxidized hemoglobin has more affinity for oxygen than deoxygenated hemoglobin. |
In the light of the above statements choose the correct answer from the options given below:
| 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: Transport of Gases |
Level 3: 35%-60%
Given below are two statements:
| Assertion (A): | Nitric oxide transport by hemoglobin to peripheral tissues is hypothesized to assist oxygen transport in tissues. |
| Reason (R): | Nitric oxide can also be transported by hemoglobin bound to specific thiol groups in the globin protein. |
| 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: Exchange of Gases |
Level 3: 35%-60%
| Assertion: | Small amounts of CO dramatically reduces hemoglobin's ability to transport oxygen. |
| Reason: | CO competes with oxygen at the heme binding site. |
| 1. | Both assertion and reason are true and the reason is the correct explanation of the assertion. |
| 2. | Both assertion and reason are true but the reason is not the correct explanation of the assertion. |
| 3. | Assertion is true but reason is false. |
| 4. | Both assertion and reason are false. |
Subtopic: Respiratory System: Transport of Gases |
Level 4: Below 35%
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | The Bohr effect enables the body to adapt to changing conditions and makes it possible to supply extra oxygen to tissues that need it the most. |
| Reason (R): | A lower pH in strenuously metabolizing tissues promotes the dissociation of oxygen from haemoglobin, and allows the surrounding tissues to obtain enough oxygen to meet their demands. |
In the light of the above statements choose the correct answer from the options given below:
| 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: Transport of Gases |
71%
Level 2: 60%+
| Assertion: | Oxygenation of blood in the lungs displaces carbon dioxide from hemoglobin which increases the removal of carbon dioxide. |
| Reason: | Oxygenated hemoglobin is a better proton donor than deoxygenated hemoglobin. |
| 1. | Both assertion and reason are true and the reason is the correct explanation of the assertion. |
| 2. | Both assertion and reason are true but the reason is not the correct explanation of the assertion. |
| 3. | Assertion is true but reason is false. |
| 4. | Both assertion and reason are false. |
Subtopic: Respiratory System: Transport of Gases Part 1 |
52%
Level 3: 35%-60%
| Assertion: | Chloride concentration is higher in systemic venous blood than in systemic arterial blood. |
| Reason: | The rise in intracellular bicarbonate in RBCs leads to bicarbonate intake and chloride export. |
| 1. | Both assertion and reason are true and the reason is the correct explanation of the assertion. |
| 2. | Both assertion and reason are true but the reason is not the correct explanation of the assertion. |
| 3. | Assertion is true but reason is false. |
| 4. | Both assertion and reason are false. |
Subtopic: Respiratory System: Transport of Gases |
Level 4: Below 35%
Assertion: The medulla oblongata uses CSF pH as an indicator of blood carbon dioxide concentration.
Reason: Carbon dioxide is the main determinant of the pH of the CSF:
| 1. | Both assertion and reason are true and the reason is the correct explanation of the assertion. |
| 2. | Both assertion and reason are true but the reason is not the correct explanation of the assertion. |
| 3. | Assertion is true but reason is false. |
| 4. | Both assertion and reason are false. |
Subtopic: Respiratory System: Regulation of Respiration |
65%
Level 2: 60%+
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | Particles that are less than 2.5 μm in diameter are the most dangerous for the pathogenesis of occupational lung disease. |
| Reason (R): | The particles of this size move into and out of alveoli, often without substantial deposition and injury. |
In the light of the above statements choose the correct answer from the options given below:
| 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 Disorders: Part 1 |
Level 3: 35%-60%
Given below are two statements:
| Assertion (A): | Rarely, emphysema may be caused by the deficiency of the enzyme Alpha 1 antitrypsin deficiency. |
| Reason (R): | Deficiency of alpha-1 antitrypsin leads to a chronic uninhibited tissue breakdown. |
| 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 Disorders: Part 1 |
64%
Level 2: 60%+
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