Hematocrit is a measure of what?

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Multiple Choice

Hematocrit is a measure of what?

Hematocrit measures the proportion of blood volume that is occupied by red blood cells. When blood is spun in a centrifuge, plasma rises to the top, a middle layer contains white blood cells and platelets, and red blood cells settle at the bottom. The hematocrit value is the height or volume of the red blood cell layer divided by the total blood volume, expressed as a percentage. This tells you how much of the blood is dedicated to carrying oxygen; it’s a key indicator of conditions like anemia (low hematocrit) or polycythemia (high hematocrit). The other components described in the options refer to different parts of the blood: white blood cells are in the buffy coat and are not the red cell fraction; the plasma is the liquid portion above the cells; platelets are also part of the buffy coat. Normal ranges are roughly 40–54% in men and 36–46% in women, with variations due to hydration and overall health.

Hematocrit measures the proportion of blood volume that is occupied by red blood cells. When blood is spun in a centrifuge, plasma rises to the top, a middle layer contains white blood cells and platelets, and red blood cells settle at the bottom. The hematocrit value is the height or volume of the red blood cell layer divided by the total blood volume, expressed as a percentage. This tells you how much of the blood is dedicated to carrying oxygen; it’s a key indicator of conditions like anemia (low hematocrit) or polycythemia (high hematocrit).

The other components described in the options refer to different parts of the blood: white blood cells are in the buffy coat and are not the red cell fraction; the plasma is the liquid portion above the cells; platelets are also part of the buffy coat. Normal ranges are roughly 40–54% in men and 36–46% in women, with variations due to hydration and overall health.

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