Heart Rate and Cardiac Output

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Which of the following is NOT a component of the cardiovascular system?

Blood vessels

Lungs (correct)

Blood

Heart

What is the function of blood vessels in the cardiovascular system?

To receive blood as it returns to the heart

To carry oxygen and nutrients to the body's cells

To ensure each capillary bed receives fresh blood (correct)

To pump blood away from the heart

How does blood flow through the systemic circuit differ from blood flow through the heart?

Blood flow through the systemic circuit is in series

Blood flow through the systemic circuit is in a random pattern

Blood flow through the systemic circuit is in a circular pattern

Blood flow through the systemic circuit is in parallel (correct)

During ventricular contraction, the papillary muscles (relax/contract).

Contract Signup and view all the answers

If end-diastolic volume does not change but end-systolic volume decreases, stroke volume (increases/decreases).

Increases Signup and view all the answers

If end-diastolic volume does not change but end-systolic volume decreases, ejection fraction (increases/decreases).

Increases Signup and view all the answers

If sympathetic and parasympathetic inputs are constant and end-diastolic volume increases, contractility of the ventricular myocardium (increases/decreases).

Increases Signup and view all the answers

Which of the following is true about the electrocardiogram (ECG)?

The T wave represents ventricular depolarization. Signup and view all the answers

Which valves in the heart allow blood to flow from atrium to ventricle?

Atrioventricular valves Signup and view all the answers

What is the mean arterial pressure (MAP)?

The average pressure throughout the cardiac cycle. Signup and view all the answers

What is the stroke volume (SV)?

The volume pumped by each ventricle in a single heartbeat. Signup and view all the answers

Which of the following factors does NOT affect stroke volume?

Heart rate Signup and view all the answers

When does the minimum aortic pressure occur during the cardiac cycle?

Immediately before opening of the aortic semilunar valve Signup and view all the answers

What is the first heart sound associated with?

The beginning of isovolumetric contraction Signup and view all the answers

Which of the following is true about the QRS complex of the ECG?

It represents ventricular depolarization Signup and view all the answers

Heart Rate and Cardiac Output

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Questions and Answers

Which of the following is NOT a component of the cardiovascular system?

What is the function of blood vessels in the cardiovascular system?

How does blood flow through the systemic circuit differ from blood flow through the heart?

During ventricular contraction, the papillary muscles (relax/contract).

If end-diastolic volume does not change but end-systolic volume decreases, stroke volume (increases/decreases).

If end-diastolic volume does not change but end-systolic volume decreases, ejection fraction (increases/decreases).

If sympathetic and parasympathetic inputs are constant and end-diastolic volume increases, contractility of the ventricular myocardium (increases/decreases).

Which of the following is true about the electrocardiogram (ECG)?

Which valves in the heart allow blood to flow from atrium to ventricle?

What is the mean arterial pressure (MAP)?

What is the stroke volume (SV)?

Which of the following factors does NOT affect stroke volume?

When does the minimum aortic pressure occur during the cardiac cycle?

What is the first heart sound associated with?

Which of the following is true about the QRS complex of the ECG?

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