Components of Cardiovascular System: Heart & Blood Vessels
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Questions and Answers

What is the function of the atria in the cardiovascular system?

  • Containing thick layer of smooth muscle in their walls
  • Recoiling to prevent marked drop in arterial blood pressure
  • Pumping blood to the circulation
  • Storing venous return during ventricular systole (correct)

    • Why is the loss of ventricular function considered fatal?

  • It leads to a marked drop in arterial blood pressure
  • It allows backflow of blood in the heart
  • It is essential for pumping blood to the circulation (correct)
  • It affects the resistance to blood flow in arterioles

    • Which valve is present between the left atrium and left ventricle?

  • Aortic valve
  • Tricuspid valve
  • Mitral valve (correct)
  • Pulmonary valve

    • What causes heart sounds in the cardiovascular system?

    <p>Closure of valves</p> Signup and view all the answers

    What is the main function of big elastic arteries like the aorta?

    <p>Expanding during ventricle systole to accommodate blood</p> Signup and view all the answers

    Where is the main site of resistance to blood flow in the cardiovascular system?

    <p>Arterioles</p> Signup and view all the answers

    Which side of the heart pumps deoxygenated blood to the pulmonary vessels?

    <p>Right ventricle</p> Signup and view all the answers

    Why is the wall of the left ventricle thicker than the wall of the right ventricle?

    <p>To pump blood against resistance in blood vessels</p> Signup and view all the answers

    In which part of the circulatory system does the exchange of gases occur between blood and alveolar air?

    <p>Capillaries</p> Signup and view all the answers

    What role does the systemic circulation play in the circulatory system?

    <p>Pumping oxygenated blood to tissues and organs</p> Signup and view all the answers

    Which type of vessels carry blood from venules back towards the right atrium?

    <p>Veins</p> Signup and view all the answers

    What is the function of the right ventricle in the cardiovascular system?

    <p>Pumping deoxygenated blood at low pressure to the pulmonary vessels</p> Signup and view all the answers

    What is the main function of capillaries in the cardiovascular system?

    <p>Site of exchange of nutrients, water, and gases between blood and interstitial fluid</p> Signup and view all the answers

    Where is the Sinoatrial (SA) node located in the heart?

    <p>Right atrium</p> Signup and view all the answers

    Which type of muscle fibers in the heart form the conducting system?

    <p>Autorhythmic fibers</p> Signup and view all the answers

    What is the main function of veins in the cardiovascular system?

    <p>Act as reservoir vessels</p> Signup and view all the answers

    What is the role of Atrioventricular (AV) node in the heart's conduction system?

    <p>Determines heart rate under normal conditions</p> Signup and view all the answers

    Which structure in the heart is known as the 'pacemaker'?

    <p>Sinoatrial (SA) node</p> Signup and view all the answers

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