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Physiology Practice Test: The Respiratory System - Gas Exchange and Regulation of Breathing
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Related Test: Physiology Practice Test: The Respiratory System - Pulmonary Ventilation

Physiology Practice Test: The Respiratory System - Gas Exchange and Regulation of Breathing
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25 Questions

1. The blood in the pulmonary vein is called mixed venous blood.
2. Within an erythrocyte, the conversion of CO2 to bicarbonate is prevented from reaching equilibrium by the ________.
3. Where in blood does the conversion of CO2 to bicarbonate occur?
4. At sea level, what is the normal partial pressure of carbon dioxide in pulmonary arteries?
5. Bicarbonate is an important buffer in blood, whose concentration is regulated by the ________.
6. The venous blood in the right ventricle is referred to as ʺmixedʺ because the blood that enters the heart ________.
7. The Haldane effect describes the increase in the affinity of hemoglobin for CO2 in the presence of a lowered ________.
8. Which of the following statements about 2,3-BPG is FALSE?
9. The presence of bicarbonate ions in the blood has an important direct effect, aside from the transport of CO2, that involves ________.
10. Movement of oxygen and carbon dioxide between alveoli and blood occurs by what process?
11. The percentage of air that is oxygen decreases as altitude increases.
12. The ________ is the respiratory center that appears to facilitate the transition between inspiration and expiration.
13. When the blood becomes ________, it can lead to a depression in the activity of the central nervous system.
14. The primary effect of increased PO2 in the lungs is to cause ________ which ________ the ventilation-perfusion ratio.
15. What is the primary driving force for the binding of oxygen to hemoglobin?
16. At equilibrium, which of the following statements is true when helium and nitrogen are present in a gas at equal partial pressures over water?
17. Central chemoreceptors are neurons in the medulla that respond directly to changes in ________.
18. What is rapid shallow breathing called?
19. The compound 2,3-bisphosphoglycerate is a metabolic intermediate of glycolysis within the erythrocyte that can affect the binding of oxygen to hemoglobin.
20. Carbaminohemoglobin is hemoglobin with carbon dioxide bound to it.
21. Respiratory acidosis will result from a(n) ________.
22. What is a decrease in carbon dioxide within the blood called?
23. Which of the following nerves have activity during quiet inspiration?
24. What is the primary mechanism of carbon dioxide transport in blood?
25. At sea level, what is the normal partial pressure of oxygen in the pulmonary veins?

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