9 Questions
What is the conduction system in the heart?
The conduction system refers to the structures in the heart that create and transmit an electrical impulse, forcing the atria and ventricles to contract.
What is the role of the sino-atrial node (SA node) in the conduction system?
The SA node generates the electrical impulse and fires it through the atrial wall, causing both the left and right atria to contract.
What is the function of the atrio-ventricular node (AV node) in the conduction system?
The AV node collects the impulse from the SA node and delays the transmission of the impulse by 0.1 seconds until the atria have finished contracting.
What is the bundle of His in the conduction system?
The bundle of His is a central structure in the heart that the electrical impulse travels down.
What happens to the electrical impulse in the bundle of His?
The electrical impulse splits in two in the bundle of His.
What are the bundle branches in the conduction system?
The bundle branches are left and right branches that carry the impulse up the left and right ventricles.
What is the role of Purkyne fibres in the conduction system?
Purkyne fibres distribute the impulse through the ventricle walls, causing the ventricles to contract.
What is the term for the heart's ability to generate its own electrical impulse?
Myogenic
How long does the AV node delay the transmission of the impulse?
0.1 seconds
Learn about the conduction system, its structure, and how it regulates the heartbeat. Understand the role of electrical impulses in contracting the atria and ventricles. Test your knowledge on this crucial aspect of the cardiovascular system.
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