Read the following statement and find out incorrect stateme…

Biology Body Fluids and Circulation Skill Builder Single Correct MCQ

Published on: August 21, 2026

Read the following statement and find out incorrect statement.

In ECG, the contraction of ventricles starts immediately after the Q wave and marks the beginning of the diastole.

Adrenal medullary hormones can increase the cardiac output.

High blood pressure leads to heart diseases and also affect vital organs like brain & kidney.

Ventricular systole increases the ventricular pressure causing the closure of tricuspid and bicuspid valves due to attempted back flow of blood into the atria.

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The correct answer is:

The ventricular contraction starts shortly after wave and marks the beginning of the systole.

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