NEET 2013
- Exam
- NEET
- Year
- 2013
- Subject
- Zoology
- Chapter
- Body Fluids and Circulation
NEET 2013 · Zoology · Body Fluids and Circulation
The diagram given here is the standard ECG of a normal person. The...
The diagram given here is the standard ECG of a normal person. The P-wave represents the
Options
- Acontraction of both the atria
- Binitiation of the ventricular contraction
- Cbeginning of the systole
- Dend of systole
Correct answer
A. contraction of both the atria
Step-by-step solution
In ECG, P-wave represents the depolarisation of atria, which leads to the contraction of both atria. T-wave represents the return of ventricles from excited to normal state. The QRS complex represents the depolarisation of the ventricles, which initiates ventricular contraction. The contraction starts shortly after and marks the beginning of systole.