Question

Performing a _____ as part of a complete blood count determines the ratio of the volume packed red blood cells to that of whole blood.

a) Hemoglobin test
b) Hematocrit test
c) Platelet count
d) White blood cell differential

Answer 1

A hematocrit test determines the ratio of the volume of packed red blood cells to that of whole blood. It measures the percentage of red blood cells (erythrocytes) in a blood sample.

Step-by-step explanation:

A hematocrit test determines the ratio of the volume of packed red blood cells to that of whole blood. It measures the percentage of red blood cells (erythrocytes) in a blood sample.

The test is performed by spinning the blood sample in a centrifuge, causing the heavier red blood cells to settle at the bottom of the tube.