Sequence the following events as they occur in the cardiac …

Biology Body Fluids and Circulation Skill Builder Single Correct MCQ

Published on: August 21, 2026

Sequence the following events as they occur in the cardiac cycle:

Semilunar valves close
, (E) , (E) , (E)

Atrial systole
, (F), (F), , , ,

Ventricular systole
, , (G), (F), , , (G), (E),

Tricuspid and bicuspid valves open
(E) Ventricular diastole
(F) SAN generates an action potential
(G) Semilunar valves open Choose the correct sequence from the options given below: , (G), , , (G), (F), ,

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The correct answer is:

The sequence starts with the SAN generating an action potential (F), leading to atrial systole . This causes the tricuspid and bicuspid valves to open , followed by ventricular systole . Due to ventricular systole, the semilunar valves are forced open . The ventricles now relaxes i.e, ventricular diastole occurs (E), and finally the semilunar valves close .

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