Q. No.A combination of carbon dioxide and hemoglobin, CO2HHb, being one of the forms in which carbon dioxide exists in the blood is the
1. oxyhemoglobin.
2. deoxyhemoglobin.
3. carboxyhemoglobin.
4. carbaminohemoglobin
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Arrange the following modes of transport of carbon dioxide in the blood from the most common to the least common.
1. bicarbonate ions
2. combined with blood proteins
3. dissolved in plasma
Choose the arrangement that lists them in the correct order from largest to smallest percentage of carbon dioxide transported.
1. 1, 2, 3
2. 1, 3, 2
3. 2, 3, 1
4. 2, 1, 3
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When fully saturated, the number of molecules each hemoglobin molecule can carry is:
1. one
2. two
3. three
4. four
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The part of the respiratory unit where the gas exchange first begins are the:
1. Atrium
2. Alveolar ducts
3. Alveolar sacs
4. Respiratory bronchioles
A person has a normal exhalation. Which of the following would be true at the end of this effort?
1. The pressure of the intrapleural cavity is the same as atmospheric pressure
2. The alveolar pressure is less than atmospheric pressure
3. The tendency for the lungs to recoil to an unstretched state is balanced by the tendency of the chest wall to expand
4. Alveolar pressure minus intrapleural pressure is zero
A condition in which a person's airways become inflamed, narrow, swell and produce extra mucus, which makes it difficult to breathe is known as
| 1. Asthma | 2. Emphysema |
| 3. Chronic bronchitis | 4. Chronic obstructive pulmonary disease |
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Given are the results of a pulmonary function test of a normal healthy male:
A. A resting tidal volume of 500 ml.
B. An anatomic dead space of 150 ml.
C. Breathing rate of 10 breaths/minute.
D. A total lung capacity of 6000ml.
E. A residual volume of 1000ml.
Which of the following statements is correct?
1. His alveolar ventilation would be 6.5 L/minute
2. Doubling the breathing rate would double his alveolar ventilation
3. Doubling the depth of respiration (tidal volume would double his alveolar ventilation)
4. His vital capacity is 5500ml
The total volume of the conducting airways from the nose or mouth down to the level of the terminal bronchioles [about 150ml] which is not capable of exchanging gases with the blood, is referred to as
1. Physiological dead space
2. Anatomical dead space
3. Alveolar dead space
4. Respiratory zone dead space
During the passage of blood through a tissue with normal metabolism, the percentage of hemoglobin that unloads oxygen is approximately:
| 1. 10% | 2. 25% |
| 3. 50% | 4. 75% |
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Which of the following is applicable to a change in the affinity of hemoglobin for oxygen?
1. Decreased in rapidly metabolizing tissues
2. Increased at higher than normal body temperatures
3. Increased at higher than normal blood 2,3-DPG levels
4. Decreased at more basic than normal blood pH
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