NEET UG BIOLOGY MCQ: BODY FLUIDS AND CIRCULATION

1 Easy

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Assertion (A) Thrombin is essential for blood clotting
Reason (R)

C{a^{2 + }}

plays an important role in blood clotting.

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Correct option: B

If both A and R are true, but R is not the correct
explanation of A

Option B (If both A and R are true, but R is not the correct explanation of A) is correct because both Thrombin being essential for blood clotting and Calcium ions playing an important role in blood clotting are true statements, but calcium's role is not the primary reason why thrombin is essential.

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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