Cardiac Cycle and Heart Muscle Function
5 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

During which phase of the cardiac cycle do the atrioventricular valves open?

  • Early diastole
  • Diastole (correct)
  • Systole
  • Late systole
  • What happens to the semilunar valves during diastole?

  • They are closed (correct)
  • They are partially open
  • They are open
  • They are not functional
  • What is the average cardiac output at rest?

  • 3-4 liters per minute
  • 7-8 liters per minute
  • 5-6 liters per minute (correct)
  • 9-10 liters per minute
  • What happens to cardiac output during exercise or physical activity?

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

    What is cardiac output calculated by multiplying?

    <p>Heart rate and stroke volume</p> Signup and view all the answers

    Study Notes

    Cardiac Cycle

    Diastole

    • Period of heart muscle relaxation
    • Lasts approximately 2/3 of the cardiac cycle
    • Heart chambers fill with blood
    • Atrioventricular valves open, allowing blood to flow from atria to ventricles
    • Semilunar valves closed, preventing backflow into pulmonary and aortic arteries

    Systole

    • Period of heart muscle contraction
    • Lasts approximately 1/3 of the cardiac cycle
    • Heart chambers pump blood out
    • Atrioventricular valves closed, preventing backflow into atria
    • Semilunar valves open, allowing blood to flow into pulmonary and aortic arteries

    Cardiac Output

    • Total volume of blood pumped by the heart per minute
    • Calculated by multiplying heart rate (beats per minute) by stroke volume (volume of blood pumped per beat)
    • Average cardiac output: 5-6 liters per minute at rest
    • Increases with exercise or physical activity

    Cardiac Cycle

    Diastole

    • Lasts approximately 2/3 of the cardiac cycle
    • Heart muscle relaxes, allowing heart chambers to fill with blood
    • Atrioventricular valves open, facilitating blood flow from atria to ventricles
    • Semilunar valves remain closed, preventing backflow into pulmonary and aortic arteries

    Systole

    • Lasts approximately 1/3 of the cardiac cycle
    • Heart muscle contracts, pumping blood out of heart chambers
    • Atrioventricular valves close, preventing backflow into atria
    • Semilunar valves open, enabling blood flow into pulmonary and aortic arteries

    Cardiac Output

    • Total volume of blood pumped by the heart per minute
    • Calculated by multiplying heart rate (beats per minute) by stroke volume (volume of blood pumped per beat)
    • Average cardiac output at rest: 5-6 liters per minute
    • Increases during exercise or physical activity

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Learn about the cardiac cycle, including the periods of diastole and systole, and how they relate to heart muscle relaxation and contraction. Understand the flow of blood through the heart chambers and valves.

    More Like This

    The Cardiac Cycle Quiz
    1 questions

    The Cardiac Cycle Quiz

    BetterLapisLazuli avatar
    BetterLapisLazuli
    Heart Physiology: The Cardiac Cycle
    18 questions
    Cardiac Cycle Overview and Phases
    44 questions
    Use Quizgecko on...
    Browser
    Browser