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  1. A

    All respiratory systems have what characteristics?

    A. have a moist gas exchange surface B. have a large surface area C. have thin surfaces to absorb ozygen D. have thick surfaces to absorb oxygen E. Choices "A" thru "C" are correct F. Choices "B" thru "D" are correct G. Choices "A" thru "D" are correct
  2. A

    Birds are able to sustain long flights at high altitudes because they?

    a. have thicker blood than other animals with many more red blood cells b. can extract oxygen during both inhalation and exhalation c. use anaerobic metabolism during flight d. decrease the heart rate during flight e. have hollow bones f. NONE of the above
  3. A

    Carbon monoxide is poisonous because it?

    a. prevents hemoglobin from carrying oxygen b. causes breathing to stop c. is toxic to the brain d. prevents the SA node from functioning e. slows the cilia in the respiratory tract
  4. A

    Which of the following respiratory events utilize bulk flow?

    A. Movement of air or water past a respiratory surface B. Exchange of oxygen and carbon dioxide C. Transportation of gasses between the respiratory system and the tissues D. Both A and B are correct E. Both A and C are correct
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