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The first heart sound is...

The first heart sound is

A

"Lub"sound at the end of systole

B

"Dub"sound at the end of systole

C

"Lub" sound at the end of systole

D

"Dub"sound at the beginning of systole

Text Solution

Verified by Experts

The correct Answer is:
C
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Similar Questions

Explore conceptually related problems

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.

which one is the first heart sound ?

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 ?

If the heart sound recording and ECG recordings are superimposed then the first heart sound would occur

Which is the first Heart sound ?

CENGAGE BIOLOGY-BODY FLUIDS AND CIRCULATIONS -ARCHIVES (Choose the correct option)
  1. The first heart sound is

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  2. A drop of each of the following, is placed separately on four sides. W...

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  3. In humans, blood passes from the post caval to the diastomic right atr...

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  4. Most active phagocytic white blood cells are

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  5. Which type of white blood cells are concerned with the release of hist...

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  6. Globulins contained in human blood plasma are primarily involved in

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  7. In a standard ECG which one of the following alphabets is the correct ...

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  8. There is no DNA in

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  9. Compared to blood our lymph has

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  10. Which one of the following plasma protein is involved in the coa...

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  11. Which one of the following statements is correct regarding blood pres...

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  12. A person with unknown blood group under ABO system, has suffered much ...

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  13. If due to some injury the chordae tendineae of the tricuspid valve of ...

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  14. Which two of the following changes (A-B) usually tend to occur in the ...

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  15. Bundle of His is a part of which one of the following organs in humans

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  16. Arteries are best defined as the vessels which

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  17. A certain road accident patien with unknown blood group needs immediat...

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  18. Person with blood group AB is considered as universal recipient becaus...

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  19. How do parasympathertic neural signals affect the working the heart

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  20. Which one of the following is correct ?

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  21. Erythropoiesis starts in

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