49. The pacemaker of the heart is the a SA node, b.AVnode, , Bundle branches e B

Question

49. The pacemaker of the heart is the a SA node, b.AVnode, , Bundle branches e Bundle branches, d. Purkinje fibers 50. The device used to measure electrical activity of the heart is called the 51 A heart rate below 60 Is called: d. murmu 52. Inflammation of the Inner ining of the heart is catled: a,pericarditis, b.myoardith, ?endocarditis, d.phlebitis 53. The term "heart attack " is another name for: a. rheumatic heart disease, c heart block b. myocardial Infarction, d. congestive heart attack 54. Another name for stationary blood clot is a: a. embolus, b. stenosls,cthrombus, d. thrombosls 55. The most important function(s) of the lymphatic system is/ are: a. fluid balance of the internal environment b, immunity. c. both a and b d. none of the above 56. Lymphatic capillaries that operate in the villi of the small intestine are called: a. lymphatics, b. lacteals, cpeyers patches, d. lymph nodes 57. The small depression on a lymph node from which the efferent lymph vessel arises is termed the: a. sinus,b. hilus,ccapsule, d. nodule Which of the following cells is not involved with nonspecific Immunity? a. natural killer cells 58. b. neutrophils, c. monocytes, d.lymphocytes 59. The "first line of defense in nonspecific Immunity is: a. Inflammation, b. phagocytosis, mechanical and chermical barriers, d.complement B cells and T cells are examples of. a. monocytes, b. lymphocytes, 60. c.neutrophils, d. macrophages

Explanation / Answer

Ans 49. a

Electrical impulses are initiated spontaneously at the SA Node.

Ans 50. c

Device use to measure the electrical activity of the heart is called Electrocardiogram having acronym ECG or EKG.

Ans 51. a

Bradycardia means brady = slow, retarded in Latin + cardia = heart in Latin. Slow heart rate than normal is called bradycardia.

Ans 52. c

Endocarditis means endo = inside, inner in Latin + itis = inflammation in Latin.

Ans 53. b

Infarction is when blood supply to an area within our body is cut off. Myocardial means pertaining to the heart muscle.

Ans 54. c

Blood clot moving in the blood vessel is an emboli. Stationary blood clot is thrombus. Inflammation due to a stationary blood clot is thrombosis. Stenosis is narrowing of the vessel.

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