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P-wave represents -...

P-wave represents -

A

Depolarization of ventricles

B

Repolarization of ventricle

C

Repolarization of atria

D

Depolarization of atria

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Electrocardiogram (ECG):** The electrocardiogram (ECG or EKG) is a graphical representation of the electrical activity of the heart over time. It consists of different waves and complexes that correspond to specific electrical events in the heart. 2. **Identifying the Components of ECG:** The ECG consists of several key components: - P-wave - QRS complex - T-wave 3. **Focusing on the P-wave:** The question specifically asks about the P-wave. 4. **Function of the P-wave:** The P-wave represents the depolarization of the atria. This is the electrical activity that leads to the contraction of the atrial muscles. 5. **Atrial Contraction:** When the atria depolarize, they contract (this is known as atrial systole), which helps to pump blood from the atria into the ventricles. 6. **Conclusion:** Therefore, the P-wave is indicative of atrial depolarization and contraction, which is essential for the proper functioning of the heart's pumping mechanism. **Final Answer:** The P-wave represents the depolarization of the atria, indicating atrial contraction. ---
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