What is the primary function of the SA node?

Conduction System

Interactive Video
•
Biology
•
10th Grade
•
Hard
Tawanna Cummings
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
It records the heart's electrical activity.
It serves as the heart's natural pacemaker.
It conducts impulses to the apex of the heart.
It delays electrical impulses to the ventricles.
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Where is the AV node located?
Within the ventricular myocardium.
At the apex of the heart.
On the other side of the right atrium, near the AV valve.
Near the entrance of the superior vena cava.
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Which component of the cardiac conduction system serves as the electrical gateway to the ventricles?
SA node
AV node
Purkinje fibers
Bundle of His
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the primary purpose of the delay caused by the AV node?
To initiate the heartbeat.
To synchronize the heartbeat with the respiratory rate.
To allow the ventricles to fill with blood before they contract.
To ensure the atria contract before the ventricles.
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the role of the AV bundle?
To initiate the heartbeat.
To repolarize the ventricles.
To delay electrical impulses.
To conduct impulses to the bundle branches.
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
How do Purkinje fibers contribute to the heart's function?
By acting as the heart's natural pacemaker.
By delaying electrical impulses to the ventricles.
By spreading impulses throughout the ventricular myocardium.
By recording the heart's electrical activity.
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What does the P wave on an ECG represent?
Ventricular depolarization.
Atrial depolarization.
Ventricular repolarization.
The delay of electrical impulses at the AV node.
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