Electrical Conduction of the Heart

What part of the electrical conduction system is labelled A?

• SA Node

• AV Node

• AV Bundle

• Bundle Branches

• Purkinje Fibers

What part of the electrical conduction system is labelled D?

• SA Node

• AV Node

• AV Bundle

• Bundle Branches

• Purkinje Fibers

Which letter is representing the Purkinje fibers which are the final area of signal transmission before the ventricles completely contract?

• A

• B

• C

• D

• E

What number is representing the aorta?

• 1

• 2

• 3

• 4

• 8

What is the definition of the Cardiac Cycle?

• the contraction of the atria
• the sequence of events that occur during one complete heartbeat
• the contraction and relaxation of the ventricles
• the circulation of blood in the heart

Order the phases an action potential travels in the conduction system

• SA node--> AV bundle branches--> AV node--> Purkinje fibers
• SA node--> AV node--> AV bundle branches-->  Purkinje fibers
• Av bundle branches--> AV node--> SA node--> Purkinje fibers
• Purkinje fibers--> SA node--> AV node--> AV bundle branches

Tags

NGSS.HS-LS1-3

The pacemaker of the heart is also known as the....

• AV node
• SA node
• Purkinje fibres
• Bundle of His

The AV node is located at...

• A
• B
• C
• D

A flap of tissue that prevents blood from flowing backward

• Aorta
• Atrium
• Septum
• Valve

Identify part numbers 3 and 5.

• 3: right atrium; 5: aorta

• 3: left atrium; 5: aorta

• 3: right atrium; 5: pulmonary artery

• 3: left atrium; 5: pulmonary artery