Circulatory System: Heart Contractions and Blood Flow
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Questions and Answers

What is the primary function of the heart contractions in the circulatory system?

  • To facilitate the delivery of oxygen and nutrients to tissues and the removal of waste products (correct)
  • To remove waste products from the heart
  • To pump oxygen and nutrients to tissues
  • To increase arterial blood pressure

    • During which phase of the heart contraction does the heart relax and fill with blood?

  • Venous phase
  • Arterial phase
  • Systole
  • Diastole (correct)

    • What is measured as the diastolic blood pressure?

  • The highest pressure on the arterial walls during systole
  • The pressure on the venous walls during diastole
  • The pressure on the arterial walls during systole and diastole
  • The lowest pressure on the arterial walls during diastole (correct)

    • Why does the arterial blood pressure increase during systole?

    <p>Because the heart contracts and pumps blood into the arteries</p> Signup and view all the answers

    Why is the patient's systolic blood pressure higher while running on a treadmill?

    <p>Because the heart rate is faster during exercise</p> Signup and view all the answers

    How are blood pressure measurements typically represented?

    <p>The higher systolic pressure over the lower diastolic pressure</p> Signup and view all the answers

    What is the result of the increased volume of blood flowing through the arteries during systole?

    <p>Increased pressure on the arterial walls</p> Signup and view all the answers

    What happens to the blood flow through the arteries during diastole?

    <p>It decreases</p> Signup and view all the answers

    What is the purpose of measuring systolic and diastolic blood pressure?

    <p>To assess the health of the circulatory system</p> Signup and view all the answers

    Why does the heart fill with blood during diastole?

    <p>Because blood returns to the heart via the veins during diastole</p> Signup and view all the answers

    What is the relationship between systolic blood pressure and physical activity?

    <p>Systolic blood pressure increases with physical activity</p> Signup and view all the answers

    What is the direction of blood flow during systole?

    <p>From the heart to the arteries</p> Signup and view all the answers

    Study Notes

    Heart Function and Blood Pressure

    • The heart pumps blood through vessels of the circulatory system, providing oxygen and nutrients to tissues and removing waste products like carbon dioxide.
    • Blood moves away from the heart through arteries and returns to the heart via veins.

    Heart Contraction Phases

    • The heart has two distinct phases: diastole and systole.
    • During diastole, the heart:
      • Relaxes and fills with blood from the veins
      • Does not pump blood from the heart
      • Has lower blood volume and pressure on arterial walls
      • Has lowest arterial blood pressure (diastolic blood pressure)
    • During systole, the heart:
      • Contracts and forces blood into the arteries
      • Has increased blood volume and pressure on arterial walls
      • Has highest arterial blood pressure (systolic blood pressure)

    Blood Pressure Measurement

    • Blood pressure measurements are represented by systolic pressure over diastolic pressure (mm Hg).
    • A patient's blood pressure measurement while running on a treadmill was 155 mm Hg, indicating higher systolic blood pressure during physical activity.

    Heart Function and Blood Pressure

    • The heart pumps blood through vessels of the circulatory system, providing oxygen and nutrients to tissues and removing waste products like carbon dioxide.
    • Blood moves away from the heart through arteries and returns to the heart via veins.

    Heart Contraction Phases

    • The heart has two distinct phases: diastole and systole.
    • During diastole, the heart:
      • Relaxes and fills with blood from the veins
      • Does not pump blood from the heart
      • Has lower blood volume and pressure on arterial walls
      • Has lowest arterial blood pressure (diastolic blood pressure)
    • During systole, the heart:
      • Contracts and forces blood into the arteries
      • Has increased blood volume and pressure on arterial walls
      • Has highest arterial blood pressure (systolic blood pressure)

    Blood Pressure Measurement

    • Blood pressure measurements are represented by systolic pressure over diastolic pressure (mm Hg).
    • A patient's blood pressure measurement while running on a treadmill was 155 mm Hg, indicating higher systolic blood pressure during physical activity.

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    Description

    Learn how the heart pumps blood through the circulatory system, delivering oxygen and nutrients to tissues and removing waste products. Understand the diastole and systole phases of heart contractions.

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