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During the arterial systole,
- a)Auricles are in relaxed phase
- b)Both auricles and ventricles are in relaxed phase
- c)Ventricles are in contraction phase
- d)Ventricles are in relaxed phase
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
During the arterial systole,a)Auricles are in relaxed phaseb)Both auri...
Ventricles are in relaxed phase during arterial systole. In arterial systole, simultaneous contraction of the auricles takes place and as a result, blood passes into the ventricles which are in relaxing phase.
NCERT Topic: Cardiac cycle
NCERT Line: "The atria undergoes relaxation (diastole), coinciding with the ventricular systole."
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During the arterial systole,a)Auricles are in relaxed phaseb)Both auri...
Understanding Arterial Systole
Arterial systole is a crucial phase in the cardiac cycle, specifically referring to the contraction of the atria (auricles) just before the ventricles contract. Here’s a detailed explanation of the different phases involved:
What Happens During Arterial Systole?
- During arterial systole, the auricles (atria) contract to push blood into the ventricles.
- Ventricles are in a relaxed phase at this time, allowing them to fill with blood from the atria.
Phases of the Cardiac Cycle
- Atrial Contraction: The contraction of the atria forces blood into the ventricles. This is the primary action during arterial systole.
- Ventricular Relaxation: While this is happening, the ventricles are not contracting; they are in a relaxed state, preparing to receive blood.
Why Option D is Correct
- The correct answer option 'D' states that ventricles are in a relaxed phase during arterial systole. This is accurate as they do not begin to contract until the next phase, known as ventricular systole, which follows after arterial systole.
Conclusion
Understanding the phases of the cardiac cycle helps in grasping how blood flows through the heart. During arterial systole, the key action is the contraction of the atria while the ventricles remain relaxed, allowing for efficient blood filling, which is essential for effective heart function.
Arterial systole is a crucial phase in the cardiac cycle, specifically referring to the contraction of the atria (auricles) just before the ventricles contract. Here’s a detailed explanation of the different phases involved:
What Happens During Arterial Systole?
- During arterial systole, the auricles (atria) contract to push blood into the ventricles.
- Ventricles are in a relaxed phase at this time, allowing them to fill with blood from the atria.
Phases of the Cardiac Cycle
- Atrial Contraction: The contraction of the atria forces blood into the ventricles. This is the primary action during arterial systole.
- Ventricular Relaxation: While this is happening, the ventricles are not contracting; they are in a relaxed state, preparing to receive blood.
Why Option D is Correct
- The correct answer option 'D' states that ventricles are in a relaxed phase during arterial systole. This is accurate as they do not begin to contract until the next phase, known as ventricular systole, which follows after arterial systole.
Conclusion
Understanding the phases of the cardiac cycle helps in grasping how blood flows through the heart. During arterial systole, the key action is the contraction of the atria while the ventricles remain relaxed, allowing for efficient blood filling, which is essential for effective heart function.
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