Practice Quiz

ACSM Personal Trainer

Category - Exercise Programming and Implementation

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Which of the following composes the greatest amount of volume in blood?
  1. Erythrocytes
  2. Leukocytes
  3. White blood cells
  4. Platelets
Explanation
Answer: A - Erythrocytes, or red blood cells, compose the greatest volume of blood, accounting for approximately 99% of the cells. A hematocrit is a measure the actual percentage of the blood’s volume that consists of red blood cells. People with lower hematocrit levels (women, typically) have reduced hemoglobin content.
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