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Cardiac Conduction and ECG

Total questions: 36

Worksheet time: 27mins

Name
Class
Date
1.

Where are the electrical signals for the conduction process created?

a)

SA Node

b)

AV Node

c)

Purkinje Fibres

d)

Bundles of His

2.

What does depolarization result in?

a)

relaxation

b)

contraction

c)

repulsion

d)

attraction

3.

What does repolarization result in?

a)

relaxation

b)

contraction

c)

attraction

d)

repulsion

4.
What is going on in the heart during the T-wave
a)
SA node triggers depolarization in atria
b)
AV node triggers depolarization in ventricle, the main pumpung action
c)
Delay caused by the SA node
d)
Repolarization of the ventricle 
5.

The last place electrical impulses move through the heart is located where?

a)

the AV Node

b)

the Purkinje fibers

c)

the SA Node

d)

the AV Bundle

6.

Depolarization of a heart chamber such as the left atrium means the left atrium has

a)

contracted

b)

relaxed

7.

The P wave on an ECG printout represents

a)

contraction of the ventricles

b)

relaxation of the ventricles

c)

contraction of the atria

d)

relaxation of the atria

8.

The T wave on an ECG printout represents

a)

contraction of the ventricles

b)

relaxation of the ventricles

c)

contraction of the atria

d)

relaxation of the atria

9.
Which part of the ECG corresponds to the repolarization of the ventricle?
a)
P wave
b)
QRS complex
c)
T wave
d)
none of the above
10.
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
a)
5, 1, 2, 3, 4, 6
b)
2, 1, 5, 3, 4, 6
c)
5, 6, 2, 3, 4, 1
d)
2, 6, 5, 3, 4, 1
11.

What is another word for AV bundle?

a)

Bundle of HIS

b)

AV node

c)

Pacemaker

d)

Purkinje Fibers

12.

What is the contraction phase of a hearbeat called?

a)

diastole

b)

sinoatrial

c)

systole

d)

atrioventricular

13.

Which structures sends the electrical stimulus to the purkinje fibres?

a)

SA Node

b)

Bundles of His

c)

AV Node

d)

Purkinje Fibres

14.

Which structure allows a delay in the signal between the atria and ventricles, allowing ventricles to fill with blood before contracting.

a)

SA Node

b)

AV Node

c)

Purkinje Fibres

d)

Bundles of His

15.

Which structure is referred to as the Pace maker of the Heart?

a)

SA Node

b)

AV Node

c)

Purkinje Fibres

d)

Bundles of His

16.

True or False: Depolarization of the heart muscle is when the muscle contracts and repolarization is when the heart muscle rests.

a)

True

b)

False

17.

What is the correct sequence of electrical conduction of the heart?

a)

AV node, internodal pathways, SA node, Bundle of his, right and left bundle branch, Purkinje fibers.

b)

SA node, internodal pathways, AV node, Purkinje fibers, right and left bundle branches, Bundle of his.

c)

SA node, internodal pathways, AV node, Bundle of his, right and left bundle branches, Purkinje fibers.

d)

None of the options are correct.

18.
Why are the walls of the left ventricle thicker than that of the right ventricle?
a)
The left ventricle must force blood into all the capillaries of the lungs 
b)
the left ventricle doesn't skip leg day
c)
This is false, the walls of the right ventricle are thicker
d)
Blood from the left ventricle is pumped throught the entire body 
19.

Which is located within the walls of the ventricles?

a)

Purkinje fibers

b)

SA node

c)

AV node

d)

AV bundle and branches

20.

The Purkinje fibers are indicated by ________.

a)

A

b)

B

c)

C

d)

D

e)

E

21.

The sinoatrial (SA) node is indicated by ________.

a)

A

b)

B

c)

C

d)

D

e)

E

22.

The atrioventricular bundle (bundle of His) is represented by ________.

a)

A

b)

B

c)

C

d)

D

e)

E

23.

The atrioventricular (AV) node is indicated by ________.

a)

A

b)

B

c)

C

d)

D

e)

E

24.

The sounds made by the heart are due the contractions of the atria and ventricles.

a)

True

b)

False

25.

What is the delivery of blood to and from the heart itself called?

a)

coronary circulation

b)

pulmonary circulation

c)

systemic circulation

d)

cardiac circulation

26.

What part of the hearts conduction system is shown in the diagram?

a)

SA node

b)

AV Node

c)

AV bundle

d)

Purkinje Fibers

27.

What part of the hearts conduction system is shown in the diagram?

a)

SA node

b)

AV Node

c)

AV bundle

d)

Purkinje Fibers

28.

What part of the hearts conduction system is shown in the diagram?

a)

SA node

b)

AV Node

c)

AV bundle

d)

Purkinje Fibers

29.

What part of the hearts conduction system is shown in the diagram?

a)

SA node

b)

AV Node

c)

AV bundle

d)

Purkinje Fibers

30.

What part of the hearts electrical conduction system "receives" the impulse from the nervous system telling it to contract?

a)

SA Node

b)

AV Node

c)

AV Bundle

d)

Purkinje Fibers

31.

What part of the hearts electrical conduction system "delays" the impulse from the atria to the ventricles?

a)

SA Node

b)

AV Node

c)

AV Bundle

d)

Purkinje Fibers

32.

What is the name of the circled area of the ECG in the diagram?

a)

P Wave

b)

QRS Complex

c)

T Wave

d)

Cardiac Cycle

33.

What is the name of the circled area of the ECG in the diagram?

a)

P Wave

b)

QRS Complex

c)

T Wave

d)

Cardiac Cycle

34.

What is the name of the circled area of the ECG in the diagram?

a)

P Wave

b)

QRS Complex

c)

T Wave

d)

Cardiac Cycle

35.
What is going on in the heart during the R-wave, also known as the QRS complex?
a)
SA node triggers depolarization in atria
b)
AV node triggers depolarization in ventricle, the main pumpung action
c)
Delay caused by the SA node
d)
Repolarization of the ventricle 
36.
The QRS wave correlates with which event?
a)
atrium contraction /signals moving from SA node to AV node
b)
ventricle contraction
c)
ventricle repolarization
d)
both atrial and ventricle contraction

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