Cardiac Cycle Quiz

What is the function of the structure labeled '3'?

• Pumps blood to the body

• Prevents the back flow of blood

• Pumps blood to the lungs

• Receives blood from the lungs

Which of the following vessels is not directly involved in the pulmonary circulation?

• Vena cava

• Pulmonary artery

• Pulmonary vein

• Aorta

What is the main function of the ventricles in the heart?

• To receive blood from the body

• To pump blood to the body or lungs

• To filter blood

• To pump blood to the heart

Which statement describes the action of the muscles in the ventricular walls?

• Blood passes from the atria into the ventricles.

• Pressure continues to increase, opening pocket valves at the base of the pulmonary artery and the aorta.

• Blood enters the atria. Their walls stretch to accommodate the blood.

• Muscles in the ventricular walls contract.

What happens when pressure continues to increase in the ventricles?

• Blood passes from the atria into the ventricles.

• Pressure continues to increase, opening valves at the base of the pulmonary artery and the aorta.

• Blood enters the atria. Their walls stretch to accommodate the blood.

• Blood leaves the heart via the pulmonary artery for the lungs and via the aorta for the rest of the body.

Which of the following is NOT an advantage of a double circulatory system?

• Oxygenated and deoxygenated blood are separate.

• Blood can be forced from the heart at a higher pressure.

• Higher pressure in the pulmonary artery.

• Blood flows slightly slower through the capillaries to pick up oxygen.

What is the significance of blood flowing slightly slower through the capillaries in a double circulatory system?

• It allows for better oxygen pickup.

• It increases the pressure in the pulmonary artery.

• It mixes oxygenated and deoxygenated blood.

• It damages the capillaries in the lungs.

Match the following

• Blood is at the highest pressure

• Aorta

• Blood travels to lungs from heart

• Vena Cava

• Blood comes in from the body

• Right atrium

• Is a vein

• Pulmonary vein

• Blood travels from lungs to heart

• Pulmonary artery

Label the structure of the heart

b

c

d

e

f

a

pulmonary vein

right ventricle

vena cava

Atrioventricular valve

aorta

left atrium

Reorder the following:

How does the blood travel from the right ventricle to the lungs?

• ventricles contract

• semilunar valve opens

• blood flows into the pulmonary artery

• semilunar valve closes

• pressure is higher in the ventricles than the arteries