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The first heart sound is...

The first heart sound is

A

Lub' during closure of semilunar valves

B

Lub' during closure of atrioventricular valves

C

Dub' during closure of atrioventricular valves

D

Dub' during closure of semilunar valves

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The correct Answer is:
B
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Explore conceptually related problems

The first heart sound results from the closure of semilunar valves.

The first heart sound lubb' is associated with

The "lubb" sound (first heart sound) is caused by

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.

Read the following four statements (1-4) (1 ) The second heart sound is DUB, which is associated with the closure of bicuspid and tricuspid valves . (2) The duration between consecutive second and first heart sound is 0.5 second in a cardiac cycle . (3) The heartbeat of a human increase when the adrenaline hormone in injected into it. (4) The atrial systole in a cardiac cycle increase the flow of blood into the respective ventricle by about 70% . How many of the above statements are incorrect ?

Which is the first Heart sound ?

Read the following statements carefully and select correct choice from below: br (a) First heart sound lub is produced due to closure of atrioventricular valves, br (b) First heart sound is of longer duration than second heart sound dub.

The second heart sound is produced

Go through the following statements, (i) The stroke volume multiplied by heart rate gives the cardiac output. (ii) The second heart sound is associated with the closure of semilunar valves (iii) Heart failure is the same as cardiac arrest or a heart attack. Which of these are correct ?

AAKASH INSTITUTE ENGLISH-BODY FLUIDS AND CIRCULATION-Try Yourself
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  6. If the T - wave of an ECG is flat, it indicates

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  7. In a normal adult human, the average cardiac output is

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  8. In humans, the right artrioventricular aperture of the heart is guarde...

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  9. Oxygenated blood is carried by

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  10. The first heart sound is

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  11. All the four chambers of heart are in a relaxed state during

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  12. Semilunar valves close when

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  13. supply/supplies oxygenated blood to heart musculature.

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  14. Cardiac activity could be moderated by the autonomous neural system. T...

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  15. Which of the following generates the action potential in the heart ?

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  16. is composed of just one cell layer.

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  17. Narrowing of lumen of atery due of deposition of fats is called

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  18. Glucose is carried from digestive tract to liver by

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  19. Deoxygenated blood from wall of heart is carried by

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  20. Which of the following represents systemic circulation ?

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