Q. No.During swallowing, the food is prevented from entering into the nasal cavity by:
1. hard palate.
2. larynx.
3. fauces.
4. uvula.
1. hard palate.
2. larynx.
3. fauces.
4. uvula.
What is the correct chronological sequence of the following structures as air passes through them in inhalation?
a. alveolar duct
b. alveolus
c. respiratory bronchiole
d. terminal bronchiole
1. a, b, c, d
2. b, c, d, a
3. c, d, a, b
4. d, c, a, b
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The most negative pressure at the end of normal inspiration would be:
| 1. alveolar | 2. tracheal |
| 3. partial | 4. pleural |
In inspiration during pulmonary ventilation the correct order of the given events is:
a. air flows into the lungs
b. alveolar volume increases
c. thoracic volume increases
d. pleural pressure decreases
e. alveolar pressure decreases
| 1. | a, b, c, d, e | 2. | b, e, a, c, d |
| 3. | c, d, b, e, a | 4. | d, e, b, a, c |
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The volume of air that is available for gas exchange each minute is the
1. minute ventilation
2. anatomical dead air space
3. physiological dead air space
4. alveolar ventilation
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 |
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The respiratory system does not:
1. allow oxygen from the air to enter the blood and carbon dioxide to leave the blood and enter the air.
2. alter the pH by changing oxygen levels.
3. provide protection against some microorganisms by preventing their entry into the body and by removing them from respiratory surfaces.
4. allow for speech and sound generation.
Name the cavities in which the lungs are located:
1. pleural and abdominal cavities.
2. pericardial and thoracic cavities.
3. pleural and thoracic cavities.
4. pleural and pericardial cavities.
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What is the term and value for the maximum amount of air a person can expel from the lungs after a maximum inhalation?
1. vital capacity, 4600
2. total lung capacity, 5800
3. inspiratory reserve volume, 3000
4. inspiratory capacity, 3500
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Under normal resting conditions, the amount of air that is actually available for exchange of gases is approximately:
1. 150 ml
2. 350 ml
3. 500 ml
4. 650 ml
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