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Chapter 13: Heart and Circulation


Critical Thinking Activities

Chapter 13: Heart and Circulation

  1. What functional advantage (s) might there be to a red blood cell lacking mitochondria?

    2. Answer

  2. If a relatively sedentary person suddenly starts to be very physically active with lots of running and other aerobic exercise, would there be more or less erythropoesis?

    3. Answer

  3. The malarial parasite, for much of its life, lives in and feeds on red blood cells. What hormone do malaria sufferers produce more than other people do?

    4. Answer

  4. Why would a cardiologist be interested in using the chemicals a mosquito or leech secretes during feeding?

    5. Answer

  5. A streptococcal infection can lead to scarring of the mitral valve (i.e. stenosis due to a rheumatic heart). How would you diagnose this condition?

    6. Answer

  6. During the colorful ceremonies where Buckingham Palace guards stand at attention for long periods of time, the soldiers are much more likely to faint than the spectators and royalty. The crowd and Queen have probably been standing at the event as long as the troops but rarely exhibit distress. Why should there be this difference?

    7. Answer

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