The heart-s natural pacemaker is termed as the-atrioventricular node -bundle of His-left and right bundle branches-sinoatrial node-

The heart’s n...

Question

The heart’s natural pacemaker is termed as the:

sinoatrial node

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atrioventricular node

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bundle of His

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left and right bundle branches

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Solution

The correct option is D
sinoatrial node

Our natural pacemaker is the sino-atrial (SA) node in the heart. This is a patch of auto excitable tissue present in the upper right-hand corner of the right atrium. This helps in the origin and conduction of the heart beat.

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What is the significance of atrio-ventricular node and atrio-ventricular bundle in the functioning of heart?

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. Sino-atrial node is called as the pacemaker of our heart. Why?

Q. Assertion :An artificial pacemaker can replace the sinoatrial node of heart. Reason: An artificial pacemaker is capable of stimulating the heart electrically to maintain its beats.

Heart beat is controlled by a natural pacemaker called SA node.

The heart’s natural pacemaker is termed as the:

The correct option is D sinoatrial node Our natural pacemaker is the sino-atrial (SA) node in the heart. This is a patch of auto excitable tissue present in the upper right-hand corner of the right atrium. This helps in the origin and conduction of the heart beat.

The correct option is D
sinoatrial node

Our natural pacemaker is the sino-atrial (SA) node in the heart. This is a patch of auto excitable tissue present in the upper right-hand corner of the right atrium. This helps in the origin and conduction of the heart beat.