Question

Place these steps of cardiac conduction in order by typing the numbers in sequence in the space below. Do not add spaces or punctuation between numbers.

1. apex of the heart
2. atria contract
3. av node
4. bundle branches
5. sa node

a) 53124
b) 25413
c) 14235
d) 35124
e) 52431

Answer 1

The steps of cardiac conduction are as follows: 1. The impulse starts at the SA node. 2. The atria contract. 3. The impulse reaches the AV node. 4. The impulse travels through the bundle branches. 5. The impulse spreads to the contractile fibers of the ventricle.

Step-by-step explanation:

1. 5. The impulse spreads to the contractile fibers of the ventricle.
2. 3. The impulse reaches the AV node.
3. 1. The impulse starts at the SA node.
4. 2. The atria contract.
5. 4. The impulse travels through the bundle branches.