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When compared with carbon dioxide, the partial pressure of oxygen in the air and its solubility in water is respectively:
1.
lower, lower
2.
lower, higher
3.
greater, lower
4.
greater, higher
Subtopic: Respiratory System: Exchange of Gases |
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What is the partial pressure of oxygen and carbon dioxide respectively in the venous blood leaving the tissues [in mm of Hg]?
| 1. | 104, 40 | 2. | 95, 40 |
| 3. | 40, 45 | 4. | 20, 46 |
Subtopic: Respiratory System: Exchange of Gases |
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A minimal amount of pleural fluid present in the pleural cavity:
| 1. | provides a medium for the exchange of respiratory gases |
| 2. | reduces friction between the visceral and parietal pleurae |
| 3. | provides lubrication for movements of the diaphragm |
| 4. | permits the exchange of electrolytes during respiration |
Subtopic: Respiratory System: Trachea & Basic Anatomy of Lung |
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When the diaphragm or external intercostal muscles contract, intrapulmonary pressure should
| 1. | increase | 2. | decrease |
| 3. | remain constant | 4. | equal atmospheric pressure |
Subtopic: Respiratory System: Pulmonary Ventilation |
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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 |
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The trachea divides into a right and a left primary bronchus at the level of:
1. 2nd thoracic vertebra
2. 3rd thoracic vertebra
3. 5th thoracic vertebra
4. 12th thoracic vertebra
1. 2nd thoracic vertebra
2. 3rd thoracic vertebra
3. 5th thoracic vertebra
4. 12th thoracic vertebra
Subtopic: Respiratory System: Trachea & Basic Anatomy of Lung |
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Regarding pulmonary capacities, the maximum volume of air a person can breathe in after a forced expiration can also be defined as:
| 1. | Total volume of air a person can inspire or expire after a normal inspiration or expiration |
| 2. | Volume of air that will remain in the lungs after a normal expiration |
| 3. | Maximum volume of air a person can breathe out after a forced inspiration |
| 4. | Total volume of air accommodated in the lungs at the end of a forced inspiration |
Subtopic: Respiratory System: Pulmonary Volumes & Capacities |
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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 |
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Under normal physiological conditions, what amount of oxygen is delivered to the tissues?
| 1. | 4 ml | 2. | 5 ml |
| 3. | 15 ml | 4. | 20 ml |
Subtopic: Respiratory System: Transport of Gases |
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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 |
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