AIPMT MAINS 2009 Zoology Cardiovascular System MCQ Question with Solution

In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart?

A

S - start of systole

B

T - end of diastole

C

P - depolarisation of the atria

D

R - repolarisation of ventricles

Correct Answer

Option C

Detailed Explanation

The P wave in an ECG represents the depolarisation of the atria, which is the first electrical activity in the cardiac cycle.

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