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Body Fluids and Its Circulation question

2020 · Q31
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Body Fluids and Its Circulation question

2020 · Q31

NEETBiologyBody Fluids and Its CirculationMCQ+4 / −1
The QRS complex in a standard ECG represents
  1. A
    Repolarisation of ventricles
  2. B
    Repolarisation of auricles
  3. C
    Depolarisation of auricles
  4. D
    Depolarisation of ventricles
View written solutionFree

Correct answer: D

The QRS complex represents the depolarisation of the ventricles, which initiates the ventricular contraction. The contraction starts shortly after Q and marks the beginning of the systole.

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