NEET Zoology Heart & Circulation Assertion Reason Question
Assertion (A): The semilunar valves prevent the backward flow of blood from the pulmonary artery and the aorta into the ventricles.
Reason (R): The heart valves allow the flow of blood only in one direction, from the atria to the ventricles and from the ventricles to the pulmonary artery or aorta.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false.
Correct Answer
Detailed Explanation
The semilunar valves are specifically designed to prevent backflow into the ventricles, and the reason explains this function as valves ensure unidirectional flow.
Found an issue with this question?
Related Questions
More from
Which of the following statements about blood composition is correct?
Which protein in blood plasma is primarily needed for the clotting or coagulation of blood?
What percentage of blood is composed of formed elements such as erythrocytes, leucocytes, and platelets?