Heart Quiz

What happens to heart rate during exercise?

• It decreases

• It remains constant

• It increases

• It first increases, then decreases

What is the relationship between cardiac output and heart rate?

• Cardiac output decreases as heart rate increases

• Cardiac output is not related to heart rate

• Cardiac output increases as heart rate increases

• Cardiac output initially increases with heart rate, then decreases

During vigorous exercise, how does the body meet its increased oxygen demand?

• By decreasing heart rate

• By increasing stroke volume and heart rate

• By decreasing stroke volume

• By increasing heart rate only

What is the effect of long-term exercise (endurance training) on resting heart rate?

• It increases

• It decreases

• It remains unchanged

• It first decreases, then increases

Which of the following best describes the relationship between stroke volume and heart rate to maintain cardiac output during mild exercise?

• Stroke volume decreases while heart rate increases

• Stroke volume and heart rate both increase

• Stroke volume increases while heart rate decreases

• Stroke volume and heart rate both decrease

What is the formula for calculating cardiac output?

• Cardiac output = Stroke volume / Heart rate

• Cardiac output = Stroke volume + Heart rate

• Cardiac output = Stroke volume × Heart rate

• Cardiac output = Heart rate / Stroke volume

Stroke volume is the

• Amount of blood pumped out of the heart per minute

• Amount of times the heart beats per minute

• Cardiac output x heart rate

• Amount of blood pumped out of the heart per beat

Which chamber of the heart receives oxygen-depleted blood from the body?

• Left atrium

• Right atrium

• Left ventricle

• Right ventricle

What is the function of the valves in the heart?

• To pump blood throughout the body

• To oxygenate the blood

• To prevent backflow of blood

• To divide the heart into chambers

Which of the following is a primary function of the circulatory system?

• To transport nutrients to cells

• To produce blood cells

• To digest food

• To control body temperature