MEDICAL
HEART AND PERICARDIUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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AV node, Bundle of His, SA node, Purkinje fibers, bundle branches
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SA node, AV node, Bundle of His, bundle branches, Purkinje fibers
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SA node, Bundle of His, AV node, Purkinje fibers, bundle branches
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SA node, Bundle of His, bundle branches, Purkinje fibers, AV node
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Detailed explanation-1: -Answer and Explanation: The option that represents the correct path for the transmission of an impulse in the intrinsic conductions system of the heart is D. sinoatrial (SA) node, atrioventricular (AV) node, atrioventricular (AV) bundle (bundle of His), right and left bundle branches, Purkinje fibers.
Detailed explanation-2: -The SA node starts the sequence by causing the atrial muscles to contract. That’s why doctors sometimes call it the anatomical pacemaker. Next, the signal travels to the AV node, through the bundle of HIS, down the bundle branches, and through the Purkinje fibers, causing the ventricles to contract.
Detailed explanation-3: -Each time the sinus node generates a new electrical impulse, that impulse spreads out through the heart’s upper chambers, called the right atrium and the left atrium. This electrical impulse, as it spreads across the two atria, stimulates them to contract, pumping blood into the right and left ventricles.
Detailed explanation-4: -The sino-atrial (SA) node. The atrio-ventricular (AV) node. The bundle of His. The left and right bundle branches. The Purkinje fibres.