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Q. No.During deglutition, the food is prevented from entering into the larynx by the cartilaginous:
1. epiglottis
2. glottis
3. aryepiglottic fold
4. laryngeal prominence
Subtopic: Respiratory System: Upper Respiratory Tract |
93%
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What is true about RBCs in humans?
| 1. | They carry about 20-25 percent of |
| 2. | They transport 99.5 percent of |
| 3. | They transport about 80 percent oxygen only and the rest 20 percent of it is transported in a dissolved state in blood plasma |
| 4. | They do not carry at all |
Subtopic: Respiratory System: Transport of Gases |
80%
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Oxygen binding to haemoglobin in blood is
| 1. | directly proportional to the concentration of CO2 in the medium |
| 2. | inversely proportional to the concentration of CO2 in the medium |
| 3. | directly proportional to the concentration of CO in the medium |
| 4. | independent of the concentration of CO in the medium |
Subtopic: Respiratory System: Transport of Gases Part 1 | Respiratory System: Transport of Gases |
81%
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Most of the aquatic arthropods respire through:
| 1. diffusion over entire body surface | 2. gills |
| 3. tracheae and tracheoles | 4. skin |
Subtopic: Respiratory System: Trachea & Basic Anatomy of Lung |
76%
From NCERT
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What prevents the entry of food into the larynx during deglutition?
1. A thin elastic cartilaginous flap
2. A thick fibrous cartilaginous flap
3. A thick elastic cartilaginous flap
4. A thin calcified cartilaginous flap
Subtopic: Respiratory System: Upper Respiratory Tract |
78%
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Consider the following two statements:
| I: | The lungs are situated in the thoracic chamber which is anatomically an air-tight chamber. |
| II: | This arrangement is essential as we cannot directly alter the thoracic volume. |
| 1. | Both I and II are correct and II correctly explains I |
| 2. | Both I and II are correct but II does not explain I |
| 3. | I is correct and II is incorrect |
| 4. | Both I and II are incorrect |
Subtopic: Respiratory System: Pulmonary Ventilation |
From NCERT
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Which of the following will not be equal in normal physiological conditions?
| 1. | Partial pressure of oxygen in deoxygenated blood and partial pressure of oxygen in tissues |
| 2. | Partial pressure of carbon dioxide in alveoli and partial pressure of carbon dioxide in oxygenated blood |
| 3. | Partial pressure of oxygen in oxygenated blood and partial pressure of oxygen in alveoli |
| 4. | Partial pressure of carbon dioxide in tissues and partial pressure of carbon dioxide in deoxygenated blood |
Subtopic: Respiratory System: Exchange of Gases |
68%
From NCERT
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The binding of oxygen with hemoglobin is primarily related to:
| 1. | Partial pressure of carbon dioxide |
| 2. | Partial pressure of oxygen |
| 3. | H+ ion concentration in body fluids |
| 4. | Presence of 2,3-DPG in erythrocytes |
Subtopic: Respiratory System: Transport of Gases |
80%
From NCERT
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Pneumotaxic center:
| 1. | moderates the function of the rhythm center |
| 2. | establishes the respiratory rhythm |
| 3. | is located in medulla oblongata |
| 4. | reduces the duration of expiration and thereby alters the respiratory rate |
Subtopic: Respiratory System: Regulation of Respiration |
67%
From NCERT
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Air conditioning – warming, humidifying and filtering of the air, is the function performed by:
| 1. | oral cavity | 2. | nasal cavity |
| 3. | pharynx | 4. | larynx |
Subtopic: Respiratory System: Upper Respiratory Tract |
84%
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