Cardiovascular System and Blood Circulation Quiz
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Questions and Answers

Which blood vessels carry oxygenated blood away from the heart?

  • Arteries (correct)
  • Veins
  • Capillaries
  • Ventricles

    • What is the thickest layer of cardiac muscle in the heart wall?

  • Endocardium
  • Myocardium (correct)
  • Epicardium
  • Pericardium

    • Which valves ensure one-way flow of blood from the atria to the ventricles?

  • Aortic semilunar valve
  • Atrioventricular valves (AVs) (correct)
  • Semilunar valves
  • Pulmonic semilunar valve

    • Where is the area known as mediastinum located?

    <p>Between the lungs and the diaphragm</p> Signup and view all the answers

    What are the chambers of the heart that receive blood from veins?

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

    Where does the exchange of fluids between the blood and interstitial space primarily occur?

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

    What is the main function of the sinoatrial (SA) node?

    <p>To set the rhythm of the heart between 61-100 bpm</p> Signup and view all the answers

    What does ventricular fibrillation (V-fib) cause?

    <p>A deadly heart quiver, making the heart quiver instead of pump blood</p> Signup and view all the answers

    What is the main purpose of an electrocardiogram (EKG)?

    <p>To assess the electrical conduction system of the heart</p> Signup and view all the answers

    What is the function of the purkinje fibers in the heart?

    <p>To increase electrical conductivity and strength of myocardial contraction</p> Signup and view all the answers

    What is the primary role of the sympathetic nerves in controlling the heart?

    <p>To increase electrical conductivity and strength of myocardial contraction</p> Signup and view all the answers

    What does atrial flutter represent?

    <p>A type of heart rhythm disorder caused by problems in the heart's electrical system</p> Signup and view all the answers

    What is the primary function of ventricular tachycardia (V-tach)?

    <p>A type of heart rhythm problem caused by irregular electrical signals in the lower chambers of the heart (ventricles)</p> Signup and view all the answers

    What does an action potential cause in the heart?

    <p>An explosion of electrical activity that leads to contraction (systole)</p> Signup and view all the answers

    What is the function of the left bundle branch in the electrical conduction system?

    <p>To quickly transmit electrical signals to cells of ventricles</p> Signup and view all the answers

    What component of an EKG represents atrial depolarization?

    <p>P wave</p> Signup and view all the answers

    What is preload in terms of hemodynamics?

    <p>Amount of blood returning to right side of the heart</p> Signup and view all the answers

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

    <p>To send blood to the ventricles</p> Signup and view all the answers

    Which component of the heart is responsible for the one-way flow of blood from the atria to the ventricles?

    <p>Tricuspid valve</p> Signup and view all the answers

    Where does the exchange of fluids between the blood and interstitial space primarily occur in the cardiovascular system?

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

    What is the primary purpose of the pericardial space in the heart?

    <p>To prevent overexpansion of the heart</p> Signup and view all the answers

    Which layer of the heart wall is responsible for contracting and pumping blood throughout the body?

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

    What is the function of semilunar valves in the heart?

    <p>To prevent backflow of blood into the ventricles</p> Signup and view all the answers

    What is the main function of the atrioventricular node (AV) in the electrical conduction system of the heart?

    <p>Slows down the electrical impulse, allowing the atria to contract before the ventricles</p> Signup and view all the answers

    Which component of an EKG represents ventricular depolarization?

    <p>QRS complex</p> Signup and view all the answers

    What is the primary role of the purkinje fibers in the electrical conduction system of the heart?

    <p>Distribute the electrical impulse to the ventricles for coordinated contraction</p> Signup and view all the answers

    What does ventricular tachycardia (V-tach) represent in terms of heart rhythm?

    <p>Rapid and irregular heartbeat originating in the ventricles</p> Signup and view all the answers

    What is the main function of the sympathetic nerves in controlling the heart?

    <p>Increase electrical conductivity and strength of myocardial contraction</p> Signup and view all the answers

    Which part of the heart's electrical conduction system sets the rhythm of the heart between 61-100 beats per minute?

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

    What does atrial flutter represent in terms of heart rhythm?

    <p>Regular, rapid heartbeat originating in the atria</p> Signup and view all the answers

    What is the primary function of ventricular fibrillation (V-fib) in the heart?

    <p>Makes your heart quiver instead of pump blood, potentially leading to sudden cardiac arrest</p> Signup and view all the answers

    Which component of an EKG represents atrial depolarization?

    <p>P wave</p> Signup and view all the answers

    What is preload in terms of hemodynamics?

    <p>Amount of blood returning to the right side of the heart</p> Signup and view all the answers

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