NEET UG BIOLOGY MCQ: BODY FLUIDS AND CIRCULATION

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Cause of closure of semilunar valves in human heart is

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Correct option: C

Ventricular diastole and decrease in ventricular pressure

Option C (Ventricular diastole and decrease in ventricular pressure) is correct because the semilunar valves close when the ventricles relax (diastole) and the pressure in the ventricles drops below the pressure in the arteries.

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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}

. What is the cardiac output in this person? Which area allows the atria to completely empty as the ventricles fill with blood? Serum is Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups The action potential is conducted to the ventricles by AVN. Damage to AVN results in