Circulation: Ecg
Easybiology
Which ECG wave corresponds to ventricular depolarization?
Select the correct option:
Solution
Incorrect! Answer:
QRS complex
- Electrocardiogram (ECG): A recording of the heart's electrical activity.
- Wave Components:
- P wave: Represents atrial depolarization (contraction of atria).
- QRS complex: Represents ventricular depolarization (contraction of ventricles). It is much larger than the P wave because the ventricles have more muscle mass.
- T wave: Represents ventricular repolarization (recovery phase).
- Note: Atrial repolarization occurs during the QRS complex but is masked by the larger ventricular signal.
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About This Question
- Subject
- biology
- Chapter
- human physiology
- Topic
- circulation: ecg
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
QRS complex
- Electrocardiogram (ECG): A recording of the heart's electrical activity.
- Wave Components:
- P wave: Represents atrial depolarization (contraction of atria).
- QRS complex: Represents ventricular depolarization (contraction of ventricles). It is much larger than the P wave because the ventricles have more muscle mass.
- T wave: Represents ventricular repolarization (recovery phase).
- Note: Atrial repolarization occurs during the QRS complex but is masked by the larger ventricular signal.
This easy difficulty biology question is from the chapter human physiology, covering the topic of circulation: ecg. It appeared in the 2025 exam.
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