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Read the following statements

I. Sympathetic division increases the rate of heart beat

II. First heart sound is caused by closure of semilunar valves

III. Most of the ventricular filling occurs during Atrial systole

IV. Tricuspid valve prevents that backward flow of deoxygenated blood

Select the correct statements

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I and II

II and III

I and IV

II and IV

answer is C.

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Detailed Solution

First heart sound is caused by closure of Tricuspid valves, most of the ventricular filling occur during Joint diatole

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