Cardiovascular System Conduction System

What area of the heart's electrical conduction is known as the "pacemaker" of the heart?

• Purknife fibers

• SA node

• Bundle of his

• Bachmann's bundle

What area of the heart is responsible for the delay of conduction between the atrium and ventricles?

• Right bundle branch

• AV node

• Bundle of his

• Bachmann bundle

True and False: The SA node is located in the left atrium.

• True

• False

Which is located within the walls of the ventricles?

• Purkinje fibers

• SA node

• AV node

• AV bundle and branches

Which is the correct path of electrical impulses through the heart?

• SA → Purkinje Fibers → Bundle Branches → AV
• SA → AV → Bundle Branches → Purkinje Fibers
• AV → SA → Bundle Branches → Purkinje Fibers
• AV → Bundle Branches → SA → Purkinje Fibers

A cardiac cycle is:

• ventricular relaxation

• ventricular contraction

• equivalent to 1 complete heart beat

• a heart attack

Which is diastole

• Atria relax and fill

• Ventricles contract and empty

• Semilunar valves are open/ AV valves are closed

• Atria contract and empty

Place the following in the correct order:
     1. atria contract
     2. AV node
     3. Bundle of His
     4. Purkinje fibers
     5. SA node
     6. ventricles contract

• 5, 1, 2, 3, 4, 6
• 2, 1, 5, 3, 4, 6
• 5, 6, 2, 3, 4, 1
• 2, 6, 5, 3, 4, 1

The left and right ventricles contract after receiving electrical impulses from what?

• Purkinje Fibers
• The SA node
• Bundle Branches
• The NA node

The heart is the size of:

• grapefruit

• orange

• fist

• countaloupe