NEET UG BIOLOGY MCQ: BODY FLUIDS AND CIRCULATION

1 Hard

1 of 1

Understanding +4 | -1

Assertion: When there is a fall in the blood pressure due to loss of blood volume, this is compensated by vasoconstriction of veins.
Reason: Veins hold the extra amount of blood which can be shifted to the arteries as required.

View answer and explanation

Correct option: A

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

Option A is correct because both the assertion and the reason are correct, and the reason correctly explains why vasoconstriction of veins compensates for a fall in blood pressure due to blood loss: veins act as a reservoir.

More Questions from BODY FLUIDS AND CIRCULATION

Practice All Chapter MCQs →

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