Understanding Blood Components and Functions

Which four components make up blood?

• platelets, plasma, glucose, electrolytes
• red blood cells, white blood cells, platelets, plasma
• white blood cells, plasma, antibodies, enzymes
• red blood cells, lymph, hormones, nutrients

Which component of blood is primarily responsible for the clotting process?

• Plasma

• Red blood cells

• White blood cells

• Platelets

What is the primary function of red blood cells in the human body?

• To fight infections

• To transport oxygen

• To produce antibodies

• To regulate body temperature

Which of the following is a major component of plasma?

• Red blood cells

• Platelets

• Water

• White blood cells

What role do white blood cells play in the circulatory system?

• They transport nutrients

• They carry carbon dioxide

• They defend against infections

• They help in blood clotting

How is oxygen transported in the blood?

• Dissolved in plasma

• Bound to haemoglobin in red blood cells

• Attached to white blood cells

• Carried by platelets

Which of the following is NOT a function of red blood cells?

• Transporting oxygen

• Carrying carbon dioxide

• Producing antibodies

• Maintaining pH balance

What percentage of blood is plasma ?

• 0.01%

• 4%

• 41%

• 55%

What is the average lifespan of a red blood cell in the human body?

• 30 days

• 60 days

• 120 days

• 180 days

Which of the following is a function of platelets?

• Transporting oxygen

• Fighting infections

• Clotting blood

• Regulating body temperature