iGCSE Biology 2h: Heart

When are the semilunar valves open?

• During ventricular relaxation

• During atrial contraction

• During ventricular contraction

• During atrial relaxation

Where are the semi lunar valves located?

• Between the atria and ventricles

• Between the atria, vena cava and pulmonary vein

• Between the ventricles, pulmonary artery and aorta

• Between the ventricles and atria

When are the AV valves closed?

• During ventricular contraction

• During atrial contraction

• During ventricular relaxation

• During atrial and ventricular relaxation

What is the function of the ventricles in the heart?

• To collect blood from the veins

• To pump blood out of the heart

• To relax the atria

• To pump blood to the atria

Where does the blood flow from the right ventricle?

• To the lungs

• To the pulmonary artery

• To the left atrium

• To the aorta

Which artery carries oxygenated blood away from the left ventricle?

• Vena cava

• Pulmonary vein

• Aorta

• Pulmonary artery

How many chambers are there in the heart?

• 2

• 3

• 4

• 6

Which system takes dexoygenated blood from the heart to the lungs and back?

• Pulmonary system

• Systemic system

• Coronary system

Which blood vessel brings deoxygenated blood back to the heart

• Pulmonary vein

• Vena cava

• Aorta

• Pulmonary artery

What is the function of the heart valves?

• To allow blood to flow in both directions

• To allow blood to flow in one direction only

• To control the rate of blood flow

• To increase heart pressure