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The first heart sound lubb' is associate...

The first heart sound lubb' is associated with

A

Beginning of isovolumetric diastole

B

Closure of mitral valve and tricuspid valves

C

Opening of atrioventricular valves

D

Closure of semilunar valves

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Read the following statement and choose the correct option. A. The first heart sound (lub) is associated with the closure of both semilunar valves. The duration between the adjacent second heart sound and first heart sound is 0.3 seconds C. The cardiac output is the stroke volume multiplied by the number of heartbeats per minute.

Which of the following statement is CORRECT ? I. Heart, the mesodermally derived organ, is situated in the thoracic cavity, in between the two lungs , slightly tilted to the left. II. During joint diastole , tricuspid and bicuspid valves are open and the semilunar values are closed. III. The first heart sound (lub) is associated with the closure of the tricuspid and biscuspid valves whereas the second heart sound (dub) is associated with the closure of the semilunar valves . IV. Neural signals through the sympathetic nerves can increases the rate of hearbeat, the strength of ventricular contraction and thereby the cardiac output.

The first heart sound is

The first heart sound is associated with :-

The second heart sound (dub) is associated with the closure of

The second heart sound (dubb) is associated with the closure of

Read the following statements : A. The action potential generated by the SA node stimulates both ventricles to undergo simultaneous contraction. B. The heart sound Lubb is associated with the closure of both semilunar valves. C. The QRS complex in ECG represents the depolarization of the ventricles. Select the appropriate option from the following :

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