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Phlebotomy Certification Practice Test
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Phlebotomy Certification
Collections Practice Test
Question 1 of 3
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What test is done before a patient donates blood?
A
hemoglobin
B
hematocrit
C
HIV
D
hematology
Blood is composed mainly of red blood cells and white blood cells suspended in an almost clear fluid called serum. The hematocrit blood test determines the percentage of red blood cells (RBCs) in the blood and is used to (dis)qualify a patient for blood donation.
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