3. Which of the following CORRECTLY describes the flow of blood in the heart? (a
ID: 3521104 • Letter: 3
Question
3. Which of the following CORRECTLY describes the flow of blood in the heart? (a Vena Cavac, Left Atrium, Left Ventricle, Pulmonary Arteries, Lungs, Pulmonary Veins, Right Atrium, Right Ventricle, Aorta (b) Vena Cavac Right Atrium, Right Ventricle, Pulmonary Arteries, Lungs, Pulmonary Veins, Left Atrium, Left Ventricle Aorta (c) Vena Cavac. Left Atrium, Left Ventricle, Pulmonary Veins, Lungs, Pulmonary Arteries, Right Atrium, Right Ventricle, Aorta (d) Vena Cavac, Right Atrium, Right Ventricle, Pulmonary Veins, Lungs, Pulmonary Arteries, Left Atrium, Left Ventricle, Aorta Which of the following vessels branches off from the right coronary artery and gives blood to the walls of the right atrium and right ventricle? (a) Marginal artery b) Anterior interventricular artery (c) Circumflex artery (d) Posterior interventricular artery 5. Which of the following parts of the cardiac conduction system is known as the pacemaker" of the heart and sets the rhythm of the heartbeat? (a) AV node (b) SA node (c) Purkinje fibers (d) Ventricular syncytium During the cardiac cycle, both ventricles contract and send their blood to the pulmonary trunk and aorta after both atria have completely contracted 6. (a) True (b) False
Explanation / Answer
3. b) vena cavae, right atrium, right ventricle, Pulmonary arteries, lungs, pulmonary veins, left atrium, left ventricle, aorta
The vena cavae carry deoxygenated blood to heart into right atrium and it flows into right ventricle. It is then taken by pulmonary arteries to lungs where it becomes oxygenated. It is then carried by pulmonary veins to the heart into left atrium and left ventricle from where it is pumped to other parts through aorta.
4. b) circumflex artery
Circumflex artery branches off of left coronary artery and supplies most of left atrium and left ventricle.
5.c) SA node
SA node gives out electrical impulses that trigger contraction of heart Chambers.
6. False
The right atrium beats first followed by right ventricle followed by left atrium followed by left ventricle.
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