Identify the correct statement.I. The impulse | vedclass

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(C) Statement $I$ is correct: The cardiac impulse originates from the Sino-Atrial Node $(SAN)$,which acts as the natural pacemaker.Statement $II$ is c

Vedclass · Accepted Answer

$I, II, III$

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(C) Statement $I$ is correct: The cardiac impulse originates from the Sino-Atrial Node $(SAN)$,which acts as the natural pacemaker.Statement $II$ is correct: The $SAN$ determines the heart rate as it initiates the rhythm of contraction.Statement $III$ is incorrect: The Bundle of His is located in the interventricular septum,but the statement provided in the original context often implies a distinction regarding the specific location or structure. However,in standard biology,the Bundle of His is indeed in the interventricular septum. Re-evaluating the options: $I, II, III$ are all anatomically correct. $IV$ is incorrect because the $AVN$ is situated in the lower left corner of the right atrium (auricle) close to the atrio-ventricular septum,not the lower left corner of the right auricle in the way described. Given the standard options,$I, II, III$ are the correct statements.

Similar Questions

Which of the following statements about the human heart is correct?

$A$: The cardiac impulse which originates from $SA$ node in mammalian heart cannot spread directly from atria to ventricles.
$R$: In mammalian heart there is no continuity between cardiac muscle fibres of atria and those of ventricles except $AV$ bundles.

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