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Semilunar valves close when...

Semilunar valves close when

A

Ventricular pressure rises

B

Atrial pressure rises

C

Ventricular pressure falls

D

Atrial pressure falls

Text Solution

Verified by Experts

The correct Answer is:
C
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Read the given statements and select the correct option w.r.t. true and false : (a) Duration of each cardiac cycle is 0.8 seconds which can be altered in fear or fight conditions, (b) Rapid passive ventricular filling takes place when auricles are in diastole and auriculoventricular valves remain closed, (c) Semilunar valves open when intraventricular pressure exceeds the pressure within aorta, (d) Sinoatrial node comprises of autoexcitable tissue.

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Semilunar valves of heart open during

Assertion : In joint diastole, all the four chamber of heart are in relaxed state. Reason : The tricuspid and bicuspid valves are open and semilunar valves are closed at this stage.

Mitral valve/semilunar valve lies between left auricle and left ventricle.

Time interval between the closure of semilunar valve and closure of AV valve is