Blood Composition Quiz

What percentage of whole blood is composed of plasma?

• 45%

• 55%

• 92%

• 7%

How many red blood cells are there per cubic millimeter of blood?

• 150,000–300,000

• 4 million–6 million

• 60–70%

• 20–25%

Which component of blood plasma is present in the highest concentration?

• Albumin

• Globulins

• Fibrinogen

• Electrolytes

What is the percentage range of lymphocytes in the blood?

• 0.5–1%

• 2–4%

• 3–8%

• 20–25%

Platelets in blood are measured in what range per cubic millimeter?

• 150,000–300,000

• 4 million–6 million

• 60–70%

• 20–25%

What percentage of blood plasma is water?

• 54%

• 38%

• 91.5%

• 7%

Approximately how many red blood cells (erythrocytes) are there per microliter of blood?

• About 500,000

• About 5 million

• About 50 million

• About 500 million

What does hematocrit refer to?

• The type of red blood cell

• The size of red blood cells

• The fraction of the total blood volume occupied by cells

• The number of white blood cells

What percentage of blood cells do white blood cells (leukocytes) constitute?

• Less than 1%

• About 10%

• About 25%

• More than 50%

Which of the following is a characteristic of white blood cells (leukocytes)?

• Smaller than erythrocytes

• Do not migrate out of capillaries

• Nucleated and larger than erythrocytes

• Only one type exists