Cardiovascular System Quiz

What is the main function of the heart?

• A. Generating blood pressure

• B. Regulating blood supply

• C. Routing blood

• D. Ensuring one way blood flow

Which artery originates on the left side of the aorta and supplies much of the anterior wall of the heart?

• A. Anterior interventricular artery

• B. Circumflex artery

• C. Left marginal artery

• D. Right coronary artery

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

• A. Allow backflow of blood from ventricles to atria

• B. Prevent blood flow from atria to ventricles

• C. Prevent backflow into the ventricles from the pulmonary trunk and aorta

• D. Allow blood flow from ventricles to atria

Which layer of the heart wall is composed of cardiac muscle cells and is responsible for contraction of the heart?

• A. Epicardium

• B. Myocardium

• C. Endocardium

• D. Pericardium

What is the purpose of the pericardial fluid in the pericardium?

• D. Regulating blood pressure

• C. Supplying blood to the heart wall

• B. Preventing friction as the heart moves within the pericardial cavity

• A. Anchoring the heart within the mediastinum

Which chamber of the heart pumps blood into the aorta for systemic circulation?

• A. Right atria

• D. Left ventricle

• B. Left atria

• C. Right ventricle

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

• A. Allow backflow into the ventricles from the pulmonary trunk and aorta

• B. Prevent blood flow from atria to ventricles

• D. Allow blood flow from ventricles to atria

• C. Prevent backflow of blood from ventricles to atria

Which vein carries blood from the lungs to the left atrium?

• A. Superior vena cava

• B. Inferior vena cava

• C. Pulmonary artery

• D. Pulmonary vein

Where is the base of the heart located?

• A. Deep to the sternum and extends to the 2nd intercostal space

• C. To the right of the midline in the thoracic cavity

• D. Near the apex of the heart

• B. Deep to the left 5th intercostal space near the midclavicular line

What is the purpose of the papillary muscles in the heart?

• A. Preventing valves from opening into the atria

• B. Anchoring the heart within the mediastinum

• C. Generating blood pressure

• D. Routing blood