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The Heart: Valves and Associated Great Vessels

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The Heart: Valves and Associated Great Vessels

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Questions and Answers

What is the primary function of the semilunar valves?

To facilitate the mixing of oxygenated and deoxygenated blood

To pump blood through the arteries

To prevent backflow of blood into the ventricles (correct)

To regulate blood pressure

What is the name of the blood vessels that supply oxygenated blood to the myocardium?

Vena cava

Pulmonary arteries

Coronary arteries (correct)

Aorta

Which of the following is NOT part of the intrinsic conduction system?

Atrioventricular node

Sympathetic nervous system (correct)

Sinoatrial node

Bundle of His

What does the P wave on an electrocardiogram represent?

The impulse across the atria (B) Signup and view all the answers

During which phase of the cardiac cycle do the atria contract simultaneously?

Systole (B) Signup and view all the answers

What is the formula for calculating cardiac output?

Heart rate x stroke volume (D) Signup and view all the answers

What is the primary function of the valves in the heart?

To allow blood to flow in only one direction (C) Signup and view all the answers

Which type of circulation strictly provides blood to the heart?

Coronary circulation (C) Signup and view all the answers

What is the function of the atrioventricular valves?

To separate the atria from the ventricles (D) Signup and view all the answers

How many valves are in the heart?

4 (C) Signup and view all the answers

What is the primary function of the cardiovascular system?

To deliver oxygen and nutrients and remove carbon dioxide and waste products (D) Signup and view all the answers

What is the function of the cardiac conduction system?

To coordinate the heartbeat (D) Signup and view all the answers

What is the term for the system of blood vessels that carries blood from the right ventricle to the lungs?

Pulmonary circulation (D) Signup and view all the answers

What is the estimated total blood volume for an average adult?

4-6L (C) Signup and view all the answers

Where is the heart located in the body?

In the thorax between the lungs (D) Signup and view all the answers

What is the purpose of the serous pericardium?

To provide lubrication for the heart (A) Signup and view all the answers

What is the approximate weight of the heart?

Less than 1 lb (D) Signup and view all the answers

What percentage of total body weight is made up of blood?

8% (D) Signup and view all the answers