4.3: Exercises
- Page ID
- 165285
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Multiple Choice
1. Which of the following will NOT facilitate the transfer of oxygen to tissues?
- decreased body temperature
- decreased pH of the blood
- increased carbon dioxide
- increased exercise
2. The majority of carbon dioxide in the blood is transported by ________.
- binding to hemoglobin
- dissolution in the blood
- conversion to bicarbonate
- binding to plasma proteins
3. The majority of oxygen in the blood is transported by ________.
- dissolution in the blood
- being carried as bicarbonate ions
- binding to blood plasma
- binding to hemoglobin
Review Questions
1. Hemoglobin is able to use 90% of its potential oxygen-carrying capacity effectively. Under similar conditions, myoglobin would be able to use only 7% of its potential capacity. What accounts for this dramatic difference?
2. How does 2,3-BPG affect oxygen affinity so significantly?
3. Explain the heterotropic regulation of hemoglobin by hydrogen ions and carbon dioxide increases the oxygen-transporting efficiency of this magnificent allosteric protein.
4. What would happen if no carbonic anhydrase were present in red blood cells?