Components of Blood

Approximately how much blood is present in the human body?

• 10 liters

• 7 liters

• 5 liters

• 3 liters

What is the primary component of plasma?

• Red blood cells

• White blood cells

• Water

• Platelets

Which cells are most abundant in blood by volume?

• Leukocytes

• Erythrocytes

• Platelets

• Macrophages

What is the main function of leukocytes?

• Carry nutrients

• Transport oxygen

• Clot blood

• Fight infections

How do platelets contribute to healing after an injury?

• By fighting infections

• By carrying nutrients

• By transporting oxygen

• By forming blood clots

What shape are red blood cells?

• Irregular

• Spherical

• Donut-shaped

• Cube-shaped

What protein allows red blood cells to carry oxygen?

• Keratin

• Collagen

• Hemoglobin

• Myoglobin

What can a fasted blood sugar test help diagnose?

• Infections

• Anemia

• Diabetes

• Cancer

What are biomarkers used for in medicine?

• To improve agricultural yields

• To predict weather patterns

• To enhance physical performance

• To diagnose diseases

Which microRNA is associated with a higher risk of colorectal cancer?

• microRNA-7

• microRNA-141

• microRNA-10b

• microRNA-21