Cardiovascular System Quiz

What is the main function of the pulmonary circulation?

• To carry oxygenated blood from the heart to the body

• To transport deoxygenated blood from the body to the heart

• To carry deoxygenated blood from the heart to the lungs and return oxygenated blood to the heart

• To transport oxygenated blood from the lungs to the body directly

Which of the following best describes the relationship between stroke volume (SV), heart rate (HR), and cardiac output (CO)?

• CO = SV ÷ HR

• CO = HR × SV

• HR = CO ÷ SV

• SV = CO ÷ HR

What happens to cardiac output during exercise?

• It decreases as the heart works harder

• It stays the same as stroke volume decreases

• It increases due to higher heart rate and stroke volume

• It increases only because heart rate increases

Which of the following explains cardiovascular drift?

• A decrease in heart rate over time during prolonged exercise

• An increase in stroke volume to maintain performance

• A steady increase in heart rate during prolonged exercise at constant intensity

• The heart's inability to pump enough blood during exercise

How does heart rate differ between trained and untrained individuals at rest?

• Trained individuals have a lower heart rate due to a higher stroke volume

• Trained individuals have a higher heart rate because they are fitter

• Untrained individuals have a lower heart rate at rest

• There is no difference between trained and untrained individuals

How does stroke volume change during exercise in a trained athlete compared to an untrained person?

• It decreases in trained athletes

• It remains the same for both groups

• It increases more significantly in trained athletes

• It increases only in untrained individuals