1. The layer of the heart that is composed mainly of cardiac muscle and forms th
ID: 198928 • Letter: 1
Question
1. The layer of the heart that is composed mainly of cardiac muscle and forms the bulk of the
heart is the
a. endocardium b. myocardium c. pericardium
2. The chamber of the heart that sends blood to the systemic circulation is the
a. left atrium b. right ventricle c. left ventricle d right atrium
3. Choose the correct track of pulmonary circuit going to the systemic circuits:
1. right side of heart 2. lungs 3. left side of the heart 4. aorta 5. inferior vena cave
a. 2, 1, 3, 4, 5 b. 2, 4, 5, 1, 3 c. 4, 2, 3, 1, 5 d. 2, 3, 4, 5, 1
4. The artery that supplies the left atrium and the posterior walls of the left ventricle is the
a. anterior interventricular artery b. marginal artery
c. posterior interventricular artery d. circumflex artery
5. The valve that connects the left atrium and the left ventricle is the
a. mitral b. semilunar c. aortic d. tricuspid
6. The sequence of the excitation of the heart is:
1. AV node 2. SA node 3. Purkinje fibers 4. Bundle branches 5. Bundle of His
a. 1, 2, 3, 4, 5 b. 3, 4, 5, 1, 2, c. 2, 3, 4, 5, 1 d. 2, 1, 5, 4, 3
7. The term _____________ refers to the contraction of the heart
a. diastole b. systole c. preload
8. The parasympathetic effects on the heart lead to
a. decreased heart rate b. increased heart rate
c. increased vagal tone d. increased metabolic rate
9. ________ is the stretch of the heart wall due to the load to which a cardiac muscle is subject before shortening.
a. systole b. diastole c. preload d. afterload
10. The most preventable heart disease is
a. ventricular septal defect b. Tetralogy of Fallot
c. atherosclerosis d. coartation of the aorta
11. An ECG provides information about
a. cardiac output b. movement of the excitation across the heart
c. coronary circulation d. valve impairment
12. Freshly oxygenated blood is first received by the
a. right atrium b. right ventricle c. left atrium d. left ventricle
13. The thick-walled arteries near the heart- the aorta and its major branches are called
a. arterioles b. capillaries c. muscular d. elastic
14. Fenestrated capillaries with perpetual open pores are located in the
a. kidneys b. brain c. liver d. spleen
15. The vessels that are 8 to 100 um in diameter and formed when capillaries unite are called
a. pre capillaries b. venules c. veins d. arterioles
16. Alcohol, adrenal hormones, ANP, ADH, Angiotensin II, Nitric Oxide are all part of the
_______________ controls of blood pressure
a. chemical b. neural c. renal b. cardiac
17. Which of the following pulses is palpated behind the knee?
a. posterior tibialis b. brachial c. carotid d. popliteal e. facial
18. Which of the following pulses is palpated in the groin region?
a. radial b. dorsalis pedis c. femoral d. brachial e. apex
19. The following factors are involved in essential hypertension except:
a. Obesity b. Heredity c. Arteriosclerosis d. Race
20. Most common causes of vascular shock are all of the following except:
a. neurogenic shock b. septic shock
c. anaphylactic shock d. hypovolemic shock
21. The portion of the intrinsic conduction system located in the interventricular septum is the
a. AV node b. SA node c. AV bundle d. Purkinje fibers
22. The sequences of contraction of the heart chambers is
a. random b. left chambers followed by the right chambers
c. both atria followed by both ventricles d. right atrium, right ventricle, left atrium, left ventricle
23. All of the following are arteries that irrigating the heart except:
a. marginal b. interventricular c. coronary d celiac circumflex
24. The area of the conduction system that initiates the heartbeat is/are ________
a. SA node b. Purkinje fibers c. bundle of His d. AV node
25. The _____________ decreases heart rate but genially has not effect on the force of contraction.
a. sympathetic stimulation b. parasympathetic stimulation c. chemical regulation
26. Veins present with the following features except:
a. valves b. transport blood from body to heart
c. lumen wide than arteries d. Tunica media is the thickest
27. The left side of the head is drain by the
a. left lymphatic duct b. right lymphatic duct c. thoracic duct d. axillary node
28. The direction of fluid of the lymph is carried away from the heart
a. T b. F
29. Plasma cells are lymphocytes that
a. produce antibodies b. phagocyte foreign substances
c. produce antigens d. produce reticular fiber stroma
30. Cells that engulf foreign substances and help activate T cell are
a. T cells b. B cells c. Reticular cells d. Macrophages e. Plasma cell
31. Lymph nodes bear fewer afferent lymphatic vessels than efferent lymphatic vessels
a. T b. F
32. The part of the lymph node that house T cell in transit is the
a. medulla b. hilus c. cortex d. capsule
33. All of these organs are part of the lymphatic system except:
a. Spleen b. Thymus c. Pancreas d. Tonsils e. Peyer’s patches
34. The lymphoid organ that functions primarily during the first years of life is the
a. Spleen b. Thymus c. Pancreas d. Tonsils e. Peyer’s patches
35. Which lymphoid organ stores products of red blood cells, is site for erythropoietin before
birth, and stores blood platelets?
a. Spleen b. Thymus c. Pancreas d. Tonsils e. Peyer’s patches
36. The saclike initial portion of the thoracic duct is the
a. lacteal b. right lymphatic duct c. cisterna chyli d. lymph sac
37. The structural framework of lymphoid organs is
a. areolar connective tissue b. hematopoietic tissue c. reticular tissue d. adipose tissue
38. The blood pressure range is greatest in a/an/the:
a. vein b. venule c. capillary d. artery e. arteriole
39. How many different sites are where a pulse can be palpated above the heart?
a. 1 b. 2 c. 3 d. 4 e. 5
40. Collections of lymphoid tissue (MALT) that guard mucosal surfaces include all of
following except
a. GI tract b. respiratory tract
c. reproductive tract d. mediastinum e. urinary tract
41. The tricuspid valve is:
a. the left AV valve b. located in the AV junction c. the right AV valve
42. The layer over the external surface of the heart also called visceral layer of the heart is the _______
a. endocardium b. myocardium c. epicardium
43. The _______________ , functional supply of the heart, is the shortest circulation in the body.
a. systemic circulation b. pulmonary circulation c. coronary circulation
44. The relaxation of the period of the heart refers to:
a. contraction b. preload c. diastole d. systole
45. The term bradycardia refers to:
a. amount of blood at any given time in the hart b. a heart rate slower than 60 beat per minute
c. stretch of the heart with each contraction d. an impulse of the AV of 60 times
46. In Tetralogy of Fallot the chamber of the heart that eventually enlarges (hypertrophies) is the __________.
a. left ventricle b. right ventricle c. left atrium d. right atrium
47. The following are factors used as short terms mechanism to control arterial blood pressure except
a. atrial natriuretic peptide b. renal regulation c. angiotensin II
d. antidiuretic hormone e. adrenal medulla hormones
48. When the heart is inefficient to sustain adequate circulation is called:
a. cardiogenic shock b. vascular shock c. hypovolemic shock d. septic shock
49. Which component of the lymphatic structures is responsible for the formation of all formed elements?
a. spleen b. lymph nodes c. thymus d. red bone marrow e. tonsils
50. Which component of the lymphatic structures is where immune response is initiated against a substance in the lymph?
a. spleen b. lymph nodes c. thymus d. red bone marrow e. tonsils
Explanation / Answer
1. Myocardium
2. Left ventricle
3. d. Blood from Lungs moves to the left side of the heart from where the aorta carries the blood to tissues to deliver oxygen andthen the deoxygenated the blood in the veins which collect in inferior/superior vena cava which deliver the blood to thr right side of the heart which the again carries to the lungs.
4. circumflex artery
5. mitral
6. 21543
7. systole
8. decreased heart rate
9. preload
10. atherosclerosis; its a life style related condition
11. movement of the excitation across the heart
12. left atrium
13. arterioles
14. kidneys
15. venules
16, chemical
17. posterior tibialis
18. femoral
19. Race
20. septic shock
21. AV bundle
22. both atria followed by both ventricles
23. celiac, it supplies blood to the digestive system and associated accessory organs
24. SA node
25. parasympathetic stimulation
26.valves
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