A-Level circulation

What type of circulation do mammals have?

• Single loop

• Figure of eight

• Open

• Systemic

Where is deoxygenated blood pumped from the right ventricle of the heart?

• To the kidneys

• To the liver

• To the lungs

• To the brain

What is the function of the coronary arteries?

• Supply the brain with oxygenated blood

• Supply the cardiac muscle with oxygenated blood

• Transport blood to the lungs

• Transport blood to the kidneys

Which blood vessels transport blood to and from the lungs?

• Coronary arteries and veins

• Pulmonary arteries and veins

• Renal arteries and veins

• Aorta and vena cava

What is the role of the aorta in the circulatory system?

• Returns blood from the body to the heart

• Transports blood from the heart to the body

• Transports blood to the lungs

• Supplies the cardiac muscle with blood

During atrial systole, what happens to the atrioventricular and semi-lunar valves?

• Atrioventricular valves close, semi-lunar valves open

• Atrioventricular valves open, semi-lunar valves closed

• Both valves open

• Both valves close

What is the main function of arteries in the circulatory system?

• Transport blood under low pressure

• Transport blood under highest pressures, from heart to organs

• Store blood for long periods

• Transport blood from organs to the heart

What occurs during ventricular systole?

• Blood moves into the ventricles

• Blood moves into the arteries

• Blood flows away in the veins

• Blood flows into the atria

How do arteries prevent pressure from falling too quickly?

• By having a wide lumen

• By having a thick elastic tissue layer and narrow lumen

• By having thin walls

• By having a large volume capacity

What is the function of the muscular tissue layer in blood vessels?

• To stretch and recoil to maintain pressure

• To contract to maintain pressure and control flow of blood

• To prevent the backwards flow of blood

• To reduce resistance to flow