Circulatory System Quiz

What is the first chamber of the heart that deoxygenated blood enters from the body tissues?

• Left atrium

• Right atrium

• Left ventricle

• Aorta

Which blood vessel carries blood from the heart to the rest of the body?

• Pulmonary veins

• Pulmonary arteries

• Aorta

• Superior vena cava

What is the role of the intrinsic conduction system in the heart?

• It regulates blood pressure.

• It sets the pace for heart contractions.

• It controls the immune response.

• It filters blood.

What happens during systole?

• The heart relaxes

• The heart contracts

• The heart rate decreases

• The heart rate remains constant

On average, how often does the cardiac cycle occur in a minute?

• 60 times

• 72 times

• 80 times

• 100 times

What happens during atrial contraction in the diastole stage?

• Ventricles fill with blood

• Ventricles contract

• Semilunar valves open

• Blood is ejected into blood vessels

What marks the beginning of diastole?

• Atrial contraction

• Ventricular contraction

• Semilunar valve opening

• Ejection phase

When do the semilunar valves open during the cardiac cycle?

• During atrial contraction

• During isovolumetric contraction

• During the ejection phase

• During diastole

Which of the following is NOT a component of cardiac output calculation?

• Blood pressure

• Heart rate

• Stroke volume

• Cardiac output

Which formula represents cardiac output?

• Cardiac output = heart rate x stroke volume

• Cardiac output = stroke volume / heart rate

• Cardiac output = heart rate + stroke volume

• Cardiac output = stroke volume - heart rate