Zoology-Cardiac Cycle
NEET Zoology Cardiac Cycle Match the Following Question
Type: Match the Following-match the column-Easy-Class 11
Match Column-I with Column-II.
| Column-I | Column-II |
|---|---|
| (a) Atrial contraction | (i) Closure of semilunar valves |
| (b) Ventricular relaxation | (ii) Opening of tricuspid and bicuspid valves |
| (c) Ventricular contraction | (iii) Opening of semilunar valves |
| (d) Atrial relaxation | (iv) Closure of tricuspid and bicuspid valves |
A
a-iv, b-ii, c-iii, d-i
B
a-ii, b-iv, c-i, d-iii
C
a-iii, b-i, c-iv, d-ii
D
a-i, b-iii, c-ii, d-iv
Correct Answer
Option A
Detailed Explanation
During the cardiac cycle, atrial contraction results in the closure of the tricuspid and bicuspid valves to prevent backflow, while ventricular relaxation leads to the opening of these valves for filling. The ventricular contraction causes the semilunar valves to open, allowing blood to flow into the pulmonary artery and aorta.
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