CIE IGCSE Biology Quiz

What is the main function of the circulatory system?

• Transport oxygen and nutrients to cells

• Help with digestion

• Control body temperature

• Support the skeletal system

Which type of heart circulation do mammals have?

• Double circulation

• Single circulation

• No circulation

• Triple circulation

What is the function of valves in the heart?

• Prevent blood from flowing backwards

• Regulate body temperature

• Produce red blood cells

• Control breathing rate

What is the role of platelets in blood clotting?

• Regulate heart rate

• Produce antibodies

• Transport oxygen in the blood

• Form scabs and stop bleeding

Which blood vessels carry blood at high pressure away from the heart?

• Venules

• Veins

• Capillaries

• Arteries

What is the main function of white blood cells?

• Regulate blood sugar levels

• Transport oxygen

• Defend against infection

• Clot blood

What happens when a coronary artery is completely blocked?

• Stroke

• High blood pressure

• Heart attack

• Angina

How are arteries adapted to their function?

• Thick muscular walls

• Thin walls

• Contain valves

• Have a large lumen

What is the purpose of the hepatic portal vein?

• Carry blood from the gut to the liver

• Transport deoxygenated blood from the liver

• Bring oxygenated blood to the liver

• Supply nutrients to the heart

What is the function of lymphocytes in the immune system?

• Transport nutrients

• Engulf pathogens

• Produce antibodies

• Regulate blood pressure