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Q. No.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.
Reason: Carbon dioxide is the main determinant of the pH of the CSF:
Subtopic: Respiratory System: Regulation of Respiration |
65%
Level 2: 60%+
Hints
Involuntary hyperventilation during an anxiety attack can cause the person to become faint because of:
| 1. | increased levels caused by increase in cellular respiration, reducing brain perfusion and causing ischemia |
| 2. | decreased levels in the blood, causing cells to lack enough ATP |
| 3. | effects of increased levels in the blood and consequent constriction of cerebral blood vessels |
| 4. | lowered levels in the blood and consequent constriction of cerebral blood vessels |
Subtopic: Respiratory Disorders: Part 1 |
Level 4: Below 35%
Hints
| 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%
Hints
| 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%
Hints
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%
Hints
Given below are two statements:
| Assertion (A): | Infant respiratory distress syndrome[hyaline membrane disease] is the leading cause of death of preterm infants. |
| Reason (R): | The lungs of infants with respiratory distress syndrome are developmentally deficient in a material called surfactant. |
| 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 |
76%
Level 2: 60%+
Hints
Given below are two statements:
| Assertion (A): | Residual volume cannot be measured directly by spirometery. |
| Reason (R): | The tidal volume, vital capacity, inspiratory capacity and expiratory reserve volume can be measured directly with a spirometer and are the basic elements of a ventilatory pulmonary function test. |
| 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: Pulmonary Ventilation |
59%
Level 3: 35%-60%
Hints
| Assertion: | A person who is born and lives at sea level will develop a slightly smaller lung capacity than a person who spends their life at a high altitude. |
| Reason: | The partial pressure of oxygen is lower at higher altitude which, as a result means that oxygen less readily diffuses into the bloodstream. |
| 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 |
72%
Level 2: 60%+
Hints
In the given diagram, the functional residual capacity will be depicted by:
| 1. | B + F | 2. | B + D + F |
| 3. | A - [B + C] | 4. | A - E |
Subtopic: Respiratory System: Pulmonary Volumes & Capacities |
52%
Level 3: 35%-60%
Hints
When a man inhales air containing normal concentration of O2 as well as CO he suffers from suffocation because
| 1. | CO reacts with , reducing its percentage in air |
| 2. | haemoglobin combines with CO instead of and forms carboxyhaemoglobin |
| 3. | CO affects diaphragm and intercostal muscles |
| 4. | CO affects the nerves of the lungs |
Subtopic: Respiratory System: Exchange of Gases |
91%
Level 1: 80%+
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