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Res 140 Quiz

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1. The lowest PO2 would normally be found in what location?




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2. In a person breathing room air (and with all else being normal), if the alveolar PCO2 rises from 40 to 70 mm Hg, what would you expect?




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3. In which of the following conditions will erythrocyte concentration of 2,3-DPG be decreased?




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4. As the amount of oxygen that dissolves in the plasma increases, what is it directly proportional to?




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5. What is the highest PAO2 one could expect to observe in an individual breathing room air at sea level?




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6. The affinity of Hb for carbon monoxide (CO) is approximately how many times greater than its affinity for oxygen?




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7. What does V/Q mismatch have the biggest impact on?




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8. The oxidation of the Hb molecule’s iron ions to the ferric state (Fe3+) results in which of the following?




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9. Under normal physiologic circumstances, how many milliliters of oxygen are capable of combining with 1 g of Hb?




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10. Which of the following are true regarding fetal hemoglobin (HbF)?




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11. C) Enhances oxygen delivery to tissues and oxygen pickup at lungs.




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12. B) 4.0 L/min




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13. B) Difference in partial pressures (pressure gradient)




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14. B) PO2 = 100 mm Hg; PCO2 = 40 mm Hg; PN2 = 573 mm Hg; PH2O = 47 mm Hg




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15. B) Gaseous diffusion




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16. C) Increases the availability of oxygen to the tissues.




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17. C) Hb




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18. B) I and II I. The affinity of Hb for oxygen decreases. II. The Hb saturation for a given PO2 falls.




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19. C) Hamburger phenomenon




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20. A) Decrease in the CaO2 - CvO2





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