Cardiovascular System Components and Heart Facts
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Questions and Answers

What is the primary pump of the cardiovascular system?

  • Venus circuit
  • Exchange vessels
  • Arterial system
  • The Heart (correct)

    • What is the average weight of the heart for an average male?

  • 50 million gallons
  • 9 oz.
  • 11 oz. (correct)
  • ~70 mL

    • Which part of the heart receives blood returning from the body?

  • Aorta
  • Left side
  • Interventricular septum
  • Right side (correct)

    • What is the function of the interventricular septum in the heart?

    <p>Separates the two sides of the heart</p> Signup and view all the answers

    Which valve is responsible for 1-way blood flow from left atrium to left ventricle?

    <p>Bicuspid/mitral valve</p> Signup and view all the answers

    What is the purpose of semilunar valves in the heart?

    <p>Prevent back-flow of blood into the heart between contractions</p> Signup and view all the answers

    During the cardiac cycle, which phase is responsible for the ejection of blood from the heart?

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

    What is the function of atrial chambers in the heart?

    <p>Receive and store blood during ventricular contraction</p> Signup and view all the answers

    What does the simultaneous contraction of both atria in the heart result in?

    <p>Forcing blood into the ventricles</p> Signup and view all the answers

    Which component of blood pressure measurement gives an estimate of the work of the heart during contraction?

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

    What happens almost immediately after atrial contraction in the heart?

    <p>Ventricles contract and propel blood into arterial system</p> Signup and view all the answers

    In the arterial system, what regulates blood flow to the periphery?

    <p>Smooth muscle in arteriole walls</p> Signup and view all the answers

    What is the formula to calculate Mean Arterial Pressure (MAP) mentioned in the text?

    <p>MAP = DBP + [0.333 (SBP - DBP)]</p> Signup and view all the answers

    What are the consequences of chronic hypertension if left untreated as mentioned in the text?

    <p>Arteriosclerosis, heart disease, stroke, and kidney failure</p> Signup and view all the answers

    Which factor plays a significant role in the long-term regulation of blood pressure according to the text?

    <p>Kidneys (renin-angiotensin-aldosterone system)</p> Signup and view all the answers

    Which sound corresponds to diastolic blood pressure when measuring arterial blood pressure?

    <p>2nd sound</p> Signup and view all the answers

    What happens to sympathetic nervous system (SNS) activity with an increase in blood pressure?

    <p>Decreased SNS activity</p> Signup and view all the answers

    What are the characteristics of arteries in hypertension according to the text?

    <p>Excessive resistance due to hardening with fatty material in walls</p> Signup and view all the answers

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