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Question 9703
NEET Biology · Medium

Body Fluids and Circulation: Valve Logic MCQ

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Valve LogicMediumQuestion 9703

Question

Atrioventricular valves prevent:

  1. A
    Backflow from ventricles into atria
    Correct
  2. B
    Blood entry into capillaries
  3. C
    Oxygen binding to haemoglobin
  4. D
    SA node firing

Correct answer

Backflow from ventricles into atria

Explanation

AV valves close during ventricular contraction to maintain one-way blood flow.

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