Ex. 11, Act 1

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Possible causes of polycythemia include

living at high altitudes.

To complete the blood test to measure hematocrit, you must seal the blood-containing capillary tubes on one end with a clay material so that

the blood sample can be centrifuged without having the blood spray out of the tube.

You would expect anemia to develop in a person

who has abnormally shaped hemoglobin in their RBCs.

Anemia refers to

a lower-than-normal hematocrit.

The diagnosis of anemia indicates

a lower-than-normal hematocrit.

Polycythemia refers to

a significant increase in RBCs.

A buffy coat layer a. consists of WBCs b. is a thin, white layer c. lies between the heavier RBC layer and the lighter, yellow plasma d. is all of the above

d. is all of the above.

Hematocrit a. refers to the percentage of white blood cells in a sample of whole blood. b. of 40 means that 40% of the volume of blood consists of RBCs. c. measures the nitrogen-transport capacity of whole blood d. in athletes is often greater than 92

of 40 means that 40% of the volume of blood consists of RBCs.


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