NEET UG BIOLOGY MCQ: BODY FLUIDS AND CIRCULATION

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The QRS complex in a standard ECG represents

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Correct option: C

Depolarisation of ventricles

Option C (Depolarisation of ventricles) is correct because the QRS complex represents the electrical activity associated with ventricular depolarization, leading to ventricular contraction.

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In ABO blood grouping, person with blood group

{O^ - }

can accept blood from On a beautiful sunny day, a man went for jogging and climbed few stairs in the park. His heart starts beating 95 times per minute. In left ventricle, the volume of blood at the end of ventricular systole is

60 \,\mathrm{~mL}

whereas the volume of blood at the end of ventricular diastole was

140 \,\mathrm{~mL}

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