Question

Select the correct order of electrical conduction throughout the heart

a. SA node - AV node - Bundle of His - Purkinje fibers
b. SA node - AV node - Purkinje fibers - Bundle of His
c. AV node - SA node - Bundle of His - Purkinje fibers
d. AV node - SA node - Purkinje fibers - Bundle of His
e. Purkinje fibers - SA node - AV node - Purkinje fibers

Answer 1

The correct order of electrical conduction throughout the heart is SA node - AV node - Bundle of His - Purkinje fibers.

Step-by-step explanation:

The correct order of electrical conduction throughout the heart is a. SA node - AV node - Bundle of His - Purkinje fibers.

The electrical conduction system of the heart starts with the SA node, which initiates the action potential that sweeps across the atria. The action potential then reaches the AV node, where there is a delay that allows the atria to complete pumping blood before the impulse is transmitted to the Bundle of His. From the Bundle of His, the impulse travels through the Purkinje fibers, causing the ventricles to contract.