Human Cardiovascular Physiology Quiz
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Questions and Answers

What is the normal range for diastolic blood pressure?

  • 90-100 mm Hg
  • 70-80 mm Hg (correct)
  • 60-70 mm Hg
  • 100-110 mm Hg
  • Which component of blood pressure does atherosclerosis affect?

  • Diastolic pressure
  • Systolic pressure
  • Venous pressure
  • Peripheral resistance (correct)
  • What is the role of 1-way valves in veins?

  • Prevent ventricular contraction
  • Increase venous pressure
  • Promote backflow of blood
  • Facilitate blood flow towards the heart (correct)
  • What causes blood to pool in veins during quiet standing?

    <p>Incompetent valves</p> Signup and view all the answers

    What does the top number in a blood pressure reading represent?

    <p>Systolic pressure</p> Signup and view all the answers

    How does atherosclerosis impact blood flow in arteries?

    <p>Increases back pressure</p> Signup and view all the answers

    Which of the following receives sensory information from baroreceptors in the aorta and carotid sinus?

    <p>Cardiac control center in the medulla</p> Signup and view all the answers

    If the right side of the heart pumped 1 ml more blood per beat, what could be the consequence within 90 minutes according to the text?

    <p>Accumulation of the entire blood volume in the lungs</p> Signup and view all the answers

    What primarily affects Stroke Volume according to the text?

    <p>Mean arteriole pressure</p> Signup and view all the answers

    In the context of blood vessels, what creates blood pressure?

    <p>Pressure gradient</p> Signup and view all the answers

    Which part of the autonomic nervous system innervates the SA and AV nodes with antagonistic controls?

    <p>Parasympathetic branch</p> Signup and view all the answers

    What monitors carbon dioxide and pH levels and influences heart rate based on their variations?

    <p>Chemoreceptors in the aorta</p> Signup and view all the answers

    Which part of the heart conducting system is responsible for initiating the stimulus that causes atria to contract?

    <p>SA Node</p> Signup and view all the answers

    What is the function of the AV Bundle (Bundle of His) in the heart conducting system?

    <p>Delivers impulse from AV Node to ventricles</p> Signup and view all the answers

    Which wave in an ECG represents the passage of current through the ventricles from the AV Node to Purkinje Fibers?

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

    What is the main function of Purkinje Fibers in the heart conducting system?

    <p>Deliver impulse to ventricles</p> Signup and view all the answers

    How does an ECG typically represent the electrical activity of the heart conducting system?

    <p>By showing characteristic waves</p> Signup and view all the answers

    Which part of the heart conducts impulses from the SA Node to the AV Node?

    <p>AV Node</p> Signup and view all the answers

    What is the primary role of the SA Node in the heart conducting system?

    <p>Generate electrical impulses rhythmically</p> Signup and view all the answers

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