The ventricles are relax and the ventric...

The ventricles are relax and the ventricular pressure falls causing the closure of semilunar valves , the above events are related to

ventricular systole.

ventricular failure

ventricular diastole.

More than one option is correct

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The Ventricles are relaxed and the Ventricular pressure falls causing the closure of semilunar valves. These events are related to .

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Indicate whether the following statements are true of false : (a) Both auricles of amphibian heart open into the same ventricle. (b) Prawn's heart carries only oxygenated blood. (c ) Purkinje fibres are nerve fibres supplying the ventricular muscles. (d) The first heart sound results from a closure of semilunar valves. (e ) The vagus nerve reduces the heart rate. (f) The A-V node normally initiates the cardiac impulse. (g) Semilunar valves open during the ventricular diastole.

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.

Semilunar valves open during the ventricular diastole.

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