Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

18. The Heart

Cardiac Action Potentials

Anatomy & Physiology

18. The Heart

Cardiac Action Potentials

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Multiple Choice

Ventricular depolarization is represented by which of the following on an electrocardiogram (ECG)?

P wave

T wave

U wave

QRS complex

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Verified step by step guidance

Understand the components of an electrocardiogram (ECG): The ECG is a graphical representation of the electrical activity of the heart. It consists of several waves, including the P wave, QRS complex, T wave, and sometimes a U wave.

Learn the significance of each wave: The P wave represents atrial depolarization, the QRS complex represents ventricular depolarization, and the T wave represents ventricular repolarization. The U wave is less commonly seen and its origin is not fully understood.

Focus on ventricular depolarization: Ventricular depolarization is the process by which the ventricles of the heart are electrically activated to contract and pump blood. This electrical activity is captured as the QRS complex on the ECG.

Understand the QRS complex: The QRS complex is typically a sharp, tall waveform that occurs after the P wave. It reflects the rapid electrical conduction through the ventricles, leading to their contraction.

Relate the QRS complex to the problem: Based on the information provided, ventricular depolarization is represented by the QRS complex on the ECG. This is the correct answer to the question.