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The sino-atrial node (or SA node) is located in the right atrium, just below the entrance of the superior vena cava in the upper right portion of the right atrium.
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What is the main pace maker of the heart?
The primary pacemaker of a normal healthy heart is the sinus node (or SA node). It is located in the right atria of the heart.
Is the peacemaker of the heart the atrioventricular node?
NO! it is the SA Node..
What node triggers the impulse in the heart?
SA node
What is the sa node?
The SA node is the "pacemaker" of the heart. Cells in the SA node are called "pacemaker" cells and they direct the contraction rate of the entire heart by generating action potentials.
Where in the heart would the SA node be found?
The anterior, upper part of the right atrium.The Sinoatrial Node or SA Node is located in the right Atrium of the Heart. The SA node is responsible of the normal sinus rhythm.
What pacemaker of the heart initiates depolarization under normal conditions?
The primary pacemaker of the mammalian heart is the sino-atrial node. If the SA node fails, the atrioventricular node (AV node) takes over pacemaking.
The SA node is the normal pacemaker of the heart because the SA node?
depolarizes to its threshold potential before other pacemakers in the heart
Which heart structure does the pacemaker substitute?
The SA Node.
What is the internal pacemaker of the heart called?
SA node (Sinus Node)
Why the sino atria node is regarded as a pacemaker in the heart?
The sinoatrial, or SA, node is known as the pacemaker of the heart. There are other potential pacemakers if the SA node fails, but it is the main pacemaker.
Why is SA node called the pacemaker of the heart?
The SA node normally functions as the pacemaker for the entire heart because its intrinsic rate is the fastest in the system. From the SA node, impulses spread out over the atria, causing them to contract.
The rate and pace of the heart is set by what?
The rate and pace of the heart are set by the SA node. There are backup systems in place if the SA node fails to do its job.
