What is the primary focus of the cardiac cycle as introduced in the video?
The Cardiac Cycle Phase 1 - Atrial Systole Made EASY!!

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Biology, Health Sciences
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The process of blood clotting
The sequence of events in a heartbeat
The function of the lungs
The role of the nervous system
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the P wave in an electrocardiogram represent?
Heart relaxation
Atrial depolarization
Ventricular contraction
Blood pressure increase
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Where is the SA node located?
In the right ventricle
In the left ventricle
In the right atrium
In the left atrium
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to the pressure in the atria when they contract?
It fluctuates
It remains the same
It decreases
It increases
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the function of the atrioventricular valves?
To prevent blood from entering the lungs
To control blood pressure
To regulate heart rate
To allow blood to flow from the atria to the ventricles
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the end diastolic volume?
The total blood volume in the body
The blood pressure during systole
The amount of blood in the ventricles after relaxation
The amount of blood in the atria after contraction
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What phase follows atrial systole in the cardiac cycle?
Ventricular systole
Isovolumetric ventricular contraction
Ventricular diastole
Atrial diastole
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