GENERAL ANATOMY
CARDIOVASCULAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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All the physiological events associated with a single heartbeat, including electrical, mechanical and heart sounds
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All the electric events associated with 2 heartbeats in a single second
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The performance of the human heart from the beginning of one heartbeat to the 4th
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Lub dub dub dub
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Detailed explanation-1: -The Cardiac Cycle. The cardiac cycle comprises all of the physiological events associated with a single heartbeat, including electrical events, mechanical events (pressures and volumes), and heart sounds. The atria and ventricles alternately contract in each cardiac cycle.
Detailed explanation-2: -The cardiac cycle is a series of pressure changes that take place within the heart. These pressure changes result in the movement of blood through different chambers of the heart and the body as a whole.
Detailed explanation-3: -Atrial diastole is the very first event of the cardiac cycle. It occurs some milliseconds before the electrical signal from the SA node arrives at the atria. The atria function as conduits that facilitate the passage of blood into the ipsilateral ventricle.
Detailed explanation-4: -The cardiac cycle involves four major stages of activity: 1) “Isovolumic relaxation", 2) Inflow, 3) “Isovolumic contraction", 4) “Ejection".
Detailed explanation-5: -Atrial diastole. Atrial systole. Isovolumic contraction. Ventricular ejection. Isovolumic relaxation. Ventricular filling.