Single Choice Type SA node is known as pacemaker of the heart and AV node is known as pacesetter...

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Single Choice Type
SA node is known as pacemaker of the heart and AV node is known as pacesetter of the heart. There are few statements given below related to SA node and AV node. Select the most appropriate option.
(1) SA node is present near the base of the interatrial septum and \( \mathrm{AV} \) node present in the right atrium near the opening of superior vena cava.
(2) The SA node is regulated by the cardiac center present in the medulla oblongata of the brain whereas AV node stimulated by the cardiac impulses originated in the SA node.
(3) SA node is present in the right atrium near the opening of superior vena cava and AV node is present near the base of the interatrial septum
(4) Both (2) and (3) statements are true.
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