LAB: Conduction System of the Heart

Question 1

Because the cardiac muscle cells are electrically connected by gap junctions, the entire myocardium behaves like a

Answer 1

Functional Syncytium

Question 2

Intrinsic

Answer 2

it does not depend on impulses from the nervous system to initiate its rhythmic contractions

Question 3

Cardica Muscles cells are electrically connected by____

Answer 3

Gap Junctions

Question 4

Intrinsic Conduction System

Answer 4

ensures that the heart muscle depolarizes in an orderly and sequential manner from atria to ventricles and that the heart beats as a coordinated unit

Question 5

What are the components of the Intrinsic System?

Answer 5

• Sinoatrial (SA) Node
• Atrioventricular (AV) Node
• AV Bundle (Bundle of His)
• Left and Right Bundle Branches
• Subendocardial conducting network (purkinje fibers)

Question 6

What system sets the rate of heart depolarization and synchronizes heart activity?

Answer 6

Nodal System

Question 7

TRUE or FALSE: SA nodes are found throughout the heart?

Answer 7

TRUE

Question 8

TRUE or FALSE: Depolarization wave can be transmitted to the ventricles only via the tract between the AV node and AV Bundle

Answer 8

TRUE

Question 9

Electrocardiograph

Answer 9

An instrument that can detect the electrical impulses of the heart

Question 10

Electrocardiogram (ECG/EKG)

Answer 10

The graph recording of the electrical changes occuring during the cardiac cycle