Zoology-Heart & Circulation
NEET Zoology Heart & Circulation Assertion Reason Question
Type: Assertion Reason-assertion-Easy-Class 11
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.
A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false.
Correct Answer
Option A
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.
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