Conduction Quiz: Can You Trace The Electrical Path?

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2. If the SA node fails and the AV node becomes the pacemaker, the heart rate would typically be:

20-40 bpm

40-60 bpm

60-100 bpm

100-150 bpm

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4. Which conduction tissues are part of the ventricular conduction system? (Select all that apply)

SA node

Bundle of His

Purkinje fibers

Left and right bundle branches

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7. Which ion is primarily responsible for the plateau phase (Phase 2) of ventricular action potential?

Sodium

Potassium

Calcium

Chloride

8. Atrial repolarization on the ECG is typically obscured by which wave?

P wave

QRS complex

T wave

U wave

9. True or False: The AV node has the fastest conduction velocity in the cardiac electrical system.

True

False

10. Which phase of the cardiac action potential involves rapid depolarization due to sodium influx?

Phase 0

Phase 1

Phase 2

Phase 3

11. Which structure initiates the heart's electrical impulse under normal conditions?

Sinoatrial (SA) node

Atrioventricular (AV) node

Bundle of His

Purkinje fibers

12. During the absolute refractory period, cardiac tissue cannot be stimulated because:

Sodium channels are fully open

Sodium channels are inactivated

Potassium channels are closed

The membrane is hyperpolarized

13. Match each cardiac tissue with its intrinsic rate:

SA node

AV node

Purkinje fibers

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15. What does the PR interval on an ECG represent?

Atrial depolarization only

Time from atrial depolarization through AV delay to ventricular depolarization

Ventricular repolarization

Time between two P waves

16. Which of the following tissues can function as a backup pacemaker if the SA node fails? (Select all that apply)

AV node (40-60 bpm)

Bundle of His (30-40 bpm)

Atrial muscle

Purkinje fibers (20-40 bpm)

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17. True or False: The Purkinje fibers are the slowest conducting tissue in the cardiac electrical system.

True

False

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19. What is the primary function of the AV node?

Initiate atrial contraction

Delay impulse conduction to allow ventricular filling

Conduct impulses to the bundle branches

Generate backup pacemaker activity

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Conduction Quiz: Can You Trace the Electrical Path?

1. The QRS complex on an ECG represents ______ depolarization.

2.

What first name or nickname would you like us to use?

2. If the SA node fails and the AV node becomes the pacemaker, the heart rate would typically be:

3. Normal ventricular depolarization occurs from the ______ to the base of the heart.

4. Which conduction tissues are part of the ventricular conduction system? (Select all that apply)

5. A prolonged PR interval may indicate a conduction delay in the ______ node.

6. The T wave on an ECG represents ______ repolarization.

7. Which ion is primarily responsible for the plateau phase (Phase 2) of ventricular action potential?

8. Atrial repolarization on the ECG is typically obscured by which wave?

9. True or False: The AV node has the fastest conduction velocity in the cardiac electrical system.

10. Which phase of the cardiac action potential involves rapid depolarization due to sodium influx?

11. Which structure initiates the heart's electrical impulse under normal conditions?

12. During the absolute refractory period, cardiac tissue cannot be stimulated because:

13. Match each cardiac tissue with its intrinsic rate:

14. The normal PR interval duration is ______ seconds.

15. What does the PR interval on an ECG represent?

16. Which of the following tissues can function as a backup pacemaker if the SA node fails? (Select all that apply)

17. True or False: The Purkinje fibers are the slowest conducting tissue in the cardiac electrical system.

18. The bundle of His divides into right and left ______ branches.

19. What is the primary function of the AV node?

20. The normal heart rate generated by the SA node is approximately ______ beats per minute.