NEET 2020 · Class 11

Body Fluids and Circulation

The QRS complex in a standard ECG represents

  1. (A)Depolarisation of auricles
  2. (B)Depolarisation of ventricles
  3. (C)Repolarisation of ventricles
  4. (D)Repolarisation of auricles

The NCERT line that answers it

Verbatim line

The QRS complex represents the depolarisation of the ventricles, which initiates the ventricular contraction.

Chapter
Body Fluids and Circulation
Section
15.3.3 Electrocardiogram (ECG)
Page
8
Words matched
14 of 14

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states 'The QRS complex represents the depolarisation of the ventricles', which directly matches the correct answer and distinguishes it from all wrong options.

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