NEETZoologyBody Fluids and Circulation
Identify the correct statement w.r.t given figure.
Options
- AQRS complex represents the depolarisation of the ventricles, which initiates the ventricular diastole.
- BThe P-wave represents the depolarisation of the atria, which leads to the contraction of the atrium.
- CThe T-wave represents the return of the ventricles from normal state to excited state.
- DThe end of the T-wave marks the end of systole.
Correct answer
D. The end of the T-wave marks the end of systole.
Step-by-step solution
The P-wave represents the electrical excitation (or depolarisation) of the atria, which leads to the contraction of both the atria. 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. The T-wave represents the return of the ventricles from excited to normal state (repolarisation). The end of the T-wave marks the end of systole.