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Musclar ridges on the interior surfacce ...

Musclar ridges on the interior surfacce of the atria are called

A

trabeculae carneae

B

endocardium

C

papillary muscles

D

musculi pectinai

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The correct Answer is:
D
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Go through the following statements (i) The inner surface of atria have got transverse muscular ridges called papillary muscles. (ii) Chordae tendinae are special fibrous cords attached to the AV valves and prevent them from collapsing back into the atria during powerful vantricular contraction (iii) The neurogenic heart stops functioning immidiately after removal from the body. (iv) The conduction of cardiac impulse is slowest in the A.V. node. Which of these are correct ?

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The number of points, having both co-ordinates as integers, that lie in the interior of the triangle with vertices (0, 0), (0, 41) and (41, 0), is :

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TRUEMAN BIOLOGY-BODY FLUIDS AND CIRCULATION-Multiple Choice Questions
  1. The bulk of the heart wall is

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  2. Though the heart is an involuntary organ, the fibers are different fro...

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  3. Musclar ridges on the interior surfacce of the atria are called

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  4. Foramen ovale is present only in the heart of embryos leading from the...

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  5. In mammals, the opening of postcaval in the right atrium is guarded by

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  6. Tricuspid valve is found in between

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  7. In which one of the following pairs, two terms represent the same thin...

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  8. Bicuspid valve (mitral) guards the opening inn mammals between:

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  9. The thick muscular projections on the walls of the ventricle are calle...

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  10. Which of the following organs has papillary muscles ?

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  11. In the heart of man, the mitral valve is attached to the papillary mus...

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  12. Which has the thickest walls :-

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  13. In mammalian embryo the pulmonary aorta communicates with carotico-sys...

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  14. Which term does not applied to human heart?

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  15. Heart of Heart is or Pace maker of the heart is

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  16. SA node is located in

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  17. Impulse originating from sinu-atrial node are transmitted to the

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  18. What happens when the pacemaker becomes nonfunctional ?

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  19. Given these structures of the conduction system of the heart 1. Bund...

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  20. The duration of cardiac cycle is

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