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Questions and Answers
What occurs during atrial systole?
What occurs during atrial systole?
- Atria contract and pump blood into the ventricles. (correct)
- Ventricles contract and pump blood to the body.
- AV valves are closed while semilunar valves are open.
- Ventricles are relaxed and fill with blood from the atria.
What is the primary function of the semilunar valves during ventricular systole?
What is the primary function of the semilunar valves during ventricular systole?
- Prevent backflow of blood into the atria.
- Allow blood to flow from ventricles to the body. (correct)
- Facilitate the passive flow of blood into the ventricles.
- Close to create pressure in the ventricles.
What occurs during the diastole phase of the cardiac cycle?
What occurs during the diastole phase of the cardiac cycle?
- AV valves are closed while semilunar valves are also closed.
- There is a brief period of relaxation allowing blood to fill the chambers. (correct)
- Blood is actively pumped from the ventricles.
- Both atria and ventricles contract simultaneously.
How can you define systole in the context of heart function?
How can you define systole in the context of heart function?
Which statement describes a feature of ventricular systole?
Which statement describes a feature of ventricular systole?
Flashcards
Atrial Systole
Atrial Systole
Atria contract, pushing blood into the ventricles.
Ventricular Systole
Ventricular Systole
Ventricles contract, pushing blood out of the heart to the arteries.
Diastole
Diastole
Relaxation of the heart chambers allowing them to fill with blood.
Systole
Systole
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Diastole - filling
Diastole - filling
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Study Notes
Cardiac Cycle Stages
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Systole: Heart muscle contracts, forcing blood out of heart chambers.
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Diastole: Heart muscle relaxes, allowing chambers to fill with blood.
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Atrial and Ventricular Coordination: Atrial and ventricular activities are synchronized; atrial systole equals ventricular systole.
Three Stages of Cardiac Cycle: Atrial Systole
- Atria Contract: Atria pump blood into ventricles.
- AV Valves Open: AV valves open, allowing blood flow.
- Ventricles Relaxed: Ventricles are relaxed during atrial contraction.
Three Stages of Cardiac Cycle: Ventricular Systole
- Ventricles Contract: Ventricles contract, forcing AV valves closed.
- Semilunar Valves Open: Semilunar valves open, allowing blood to pump into pulmonary artery and aorta.
- Blood Pumped: Blood is pumped to the pulmonary artery and aorta.
Three Stages of Cardiac Cycle: Diastole
- Relaxation: Both atria and ventricles relax briefly.
- Blood Flow to Atria: Blood flows into atria; some blood passively enters ventricles.
- Filling Period: Diastole is a period of filling the heart chambers.
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Description
Explore the stages of the cardiac cycle, including systole and diastole, as well as the coordination between atrial and ventricular contractions. Understand how the heart functions during each phase to efficiently pump blood throughout the body.
