Pacemaker is

AV node

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Ventricular muscles

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Bundle of His

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SA node

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Solution

The correct option is D
SA node

The pacemaker is the sinoatrial (SA) node as the heart beat originates from the SA node which may sometimes get damaged or defective, so the heart does not function properly. This can be remedied by the grafting of an artificial pacemaker.

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The cardiac impulse is initiated and conducted further upto ventricle. The correct sequence of conduction of impulse is
$\begin{matrix} (a) & S A N o d e & A V N o d e & P u r k i n j e f i b e r & A V B u n d l e (b) & S A N o d e & P u r k i n j e f i b e r & A V N o d e & A V B u n d l e (c) & S A N o d e & A V N o d e & A V B u n d l e & P u r k i n j e f i b e r (d) & S A N o d e & P u r k i n j e f i b e r & A V B u n d l e & A V N o d e \end{matrix}$

Q. Mark the odd one in each of the following series:
Purkinje fibres, AV bundle, AV valve, SA node.

Q. Pacemaker (SA Node) of the heart is situated

Q. Assertion :The SA node acts as pacemaker Reason: The SA node is located in the wall of the right atrium near the interatrial septum.

Q. Assertion :The SA node acts as pacemaker. Reason: The SA node is located in the wall of the right atrium near the inter-atrial septum.

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Pacemaker is

The correct option is D SA node The pacemaker is the sinoatrial (SA) node as the heart beat originates from the SA node which may sometimes get damaged or defective, so the heart does not function properly. This can be remedied by the grafting of an artificial pacemaker.

The correct option is D
SA node

The pacemaker is the sinoatrial (SA) node as the heart beat originates from the SA node which may sometimes get damaged or defective, so the heart does not function properly. This can be remedied by the grafting of an artificial pacemaker.