Human Biology, 14 Edition

Published by McGraw-Hill Education
ISBN 10: 1-25924-574-8
ISBN 13: 978-1-25924-574-9

Chapter 6 - Engage - Page 130: 5


5. The abuse of erthropoietin (doping) results in the production of too many red blood cells (RBCs), a form of polycythemia.

Work Step by Step

The abnormally large number of RBCs increases the viscosity of the blood, and clogs the small blood vessels; consequently, the heart has to work harder to pump the blood around the body. Adverse effects of polycythemia include dyspnea, headaches, tinnitus, dizziness, spleen damage, stroke and heart attack/myocardial infarction.
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