Chapter 1: Depolarization Flashcards
1
Q
During the cardiac cycle, where does an electrical impulse originates?
A
In the Sinoatrial (SA) node located in the upper part of the right atrium.
2
Q
What does the impulse causes?
A
The atrial to contract, which is the first part of the cardiac cycle.
3
Q
What happens when electrical impulses are sent along the conduction system of the heart via the electrical cells?
A
Myocardial cells contract, causing the heart muscle to pump the blood from chamber to chamber and through the lungs.
4
Q
What is the contraction of the cardiac cells is called?
A
Depolarization.
5
Q
The SA Node is also known as?
A
The pacemaker of the heart.
