ANATOMY
CHEST AND CARDIOVASCULAR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The ventricles begin to contract
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The atriums contract
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The signal travels to the Bundle of His
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The ventricles collapse
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Detailed explanation-1: -When the Purkinje fibers deliver electrical signals to your ventricles, the ventricles contract. As they contract, blood flows from your right ventricle to your pulmonary arteries and from your left ventricle to your aorta. The aorta is the body’s largest artery. It sends blood from your heart to the rest of your body.
Detailed explanation-2: -During the ventricular contraction portion of the cardiac cycle, the Purkinje fibers carry the contraction impulse from the left and right bundle branches to the myocardium of the ventricles.
Detailed explanation-3: -Answer and Explanation: Ventricular contraction begins at the apex of the heart. As the electrical activity passes from top to bottom in the atrium, it then passes directly through the septum in the Bundle of His.
Detailed explanation-4: -The sinus node generates an electrical stimulus regularly, 60 to 100 times per minute under normal conditions. The atria are then activated. The electrical stimulus travels down through the conduction pathways and causes the heart’s ventricles to contract and pump out blood.