What condition precipitates polycythemia?
a. Dehydration
b. Severe infections
c. Immunosuppression
d. Prolonged tissue hypoxia
ANS: D
Oxygen transport depends on both the number of circulating RBCs and the amount of normal hemoglobin in the cell. This explains why polycythemia (increase in the number of erythrocytes) occurs in conditions characterized by prolonged tissue hypoxia, such as cyanotic heart defects. Dehydration, severe infections, or immunosuppression will not precipitate polycythemia.
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Indicate whether the statement is true or false.
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