NEET Practice Paper Chapter- Circulatory System by Teaching Care online tuition and coaching classes

NEET Practice Paper Chapter- Circulatory System by Teaching Care online tuition and coaching classes

1. Regulation of heart beat in mammals is due to

• The volume of blood in the circulatory system
• The presence of excess of oxygen in blood
• The presence of thyroxine in blood
• The presence of pacemaker in the heart

 

2. Purkinje’s fibres of the vertebrate heart are modified
   • Parasympathetic nerves
   • Sympathetic nerves
   • Motor nerves
   • Muscle cells

 

3. The nerve like modified muscle in the right auricle is known as
   • Lymph node
   • Atrio-ventricular node
   • Pacemaker
   • Bulbus arteriosus

 

4. Pace maker of the heart is
   • A. node
   • V. node
   • V. septum
   • A. septum

 

5. The first heart sound is
   • ‘Lubb’ sound at the end of systole
   • ‘Dub’ sound at the end of systole
   • ‘Lubb’ sound at the beginning of systole
   • ‘Dub’ sound at the beginning of systole

 

6. Heart beat can be initiated by
   • Sinu-auricular node
   • Sinu-ventricular node
   • Sodium ion
   • Purkinje’s fibres

 

7. Which one is the correct route through which pulse making impulse travels in the heart
   • SA node → Purkinje fibres → Bundle of His → AV node → Heart muscles
   • AV node → SA node → Purkinje fibres → Bundle of His → Heart muscles
   • AV node → Bundle of His → SA node → Purkinje fibres → Heart muscles
   • SA node → AV node → Bundle of His → Purkinje fibres → Heart muscles

 

8. The rate of heart beat per minute is highest in case of
   • Elephant (b) Whale (c) Man (d) Mouse

 

9. The viscosity of blood is important in maintaining
   • Acid-base balance
   • Diastolic blood pressure
   • Systolic blood pressure
   • Osmotic pressure

 

10. Regulation of heart beat in mammals is due to
    • Presence of excess of oxygen in blood
    • The presence of pacemaker in the heart
    • The presence of thyroxin in blood
    • The volume of blood in the circulatory system

 

11. Pace maker of the heart is situated
    • In wall of right atrium close to eustachian valve
    • On intra-auricular septum
    • On inter-venticular septum
    • In wall of left atrium close to the opening of pulmonary veins

 

12. Stimulation of the vagus nerve will make the heart beat  
    • Faster (b) 70 times / minute (c) Slower (d) Normal

 

13. During systole
    • Auricles and ventricles contract simultaneously
    • Auricles and ventricles contract separately
    • Only auricles contract
    • Only ventricles contract

 

14. What is the maximum efficiency of heart
    • 10 – 15 % (b) 20 – 25 % (c) 40 – 60% (d) 100%
15. Tricuspid valve are present between
    • Right auricle and right ventricle
    • Sinous venosus and right auricle
    • Left auricle and left ventricle
    • Superior and inferior vena cava

 

16. Auricles of human heart contains
    • Columnae carnae
    • Chordae tendenae
    • Papillary muscles
    • Purkinje’s fibres

 

17. Right auricle of mammalian heart receives blood from
    • Sinus vinosus
    • Pulmonary veins
    • Precavals
    • Pre and postcavals

 

18. During ventricular diastole
    • The auricles relax
    • The heart contracts
    • The heart pumps blood
    • The ventricles relax

 

19. In rabbit, the four chambered heart promotes
    • Double circulation
    • Single circulation
    • Systematic circulation
    • Venous circulation

 

20. Trilobed valve present between right atrium and ventricle in mammalian heart is
    • Triac
    • Triad
    • Tricuspid or besian
    • Trigeminal

 

21. For reaching left side of heart, blood must pass through
    • Liver (b) Kidneys (c) Lungs (d) Brain

 

22. Which one of the statement is correct with reference to the circulation of blood in a mammal
    • Left auricle receives oxygenated blood from the lungs
    • Pulmonary artery returns oxygenated blood from the lungs to the left auricle
    • Pulmonary vein carries venous blood from right auricle to lungs
    • Venous blood is returned to the left auricle

 

23. Mixing up of arterial and venous blood does not take place in a heart having
    • Two chambers
    • Four chambers
    • Three chambers
    • None of the above

 

24. Tricuspid valve is present in
    • Right auricle
    • Right ventricle
    • Left ventricle
    • Left auricle

 

25. Mitral valve in mammals guards the opening between
    • Stomach and intestine
    • Pulmonary vein and left auricle
    • Right auricle and right ventricle
    • Left auricle and left ventricle

 

26. Tunica media of an elastic artery is made up of mainly
    • Smooth muscle fibre
    • Loose alveolar tissue
    • Elastic fibres
    • Collagen fibres

 

27. Which of the following statements is false
    • Blood from the right side of the heart is carried to the lungs by the pulmonary artery
    • The term ‘pleura‘ refers the double layered covering of the kidney
    • Pancreas is both an exocrine and endocrine gland
    • Scurvy is caused by the deficiency of vitamin C

 

28. Histology of heart superficially shows the following structure except
    • Endocardium
    • Cardiac muscle
    • Fibrous pericardium
    • Tunica intima

 

29. Cardiac muscle is composed of
    • Striated, branched and voluntary muscle fibres
    • Unstriated (smooth), spindle shaped and voluntary muscle fibres
    • Unstriated (smooth), spindle shaped and involuntary muscle fibres
    • Striated, branched and involuntary muscle fibres

 

30. How much of the total blood volume is present in heart
    • 5% (b) 17% (c) 9% (d) 15%
31. Purkinje fibre is found in
    • Conduction system of heart
    • Brain
    • Nephrons of kidneys
    • Sensation of skin

 

32. Neurogenic heart is characteristic of
    • Lower vertebrates (b) Humans (c) Rat (d) Rabbit

 

33. Eustachian valve which is of no significance in the adult mammal, is a vestigial organ, a vestige of
    • Spiral valve
    • Sinus venosus
    • Sino-auricular valve
    • Semilunar valve

 

34. Which is not true for cardiac muscles
    • Presence of intercalated disc
    • Striated nature
    • Involuntary
    • Voluntary

 

35. The pericardium and the pericardial fluid help in
    • Protecting the heart from friction, shocks and keeps it moist
    • Pumping the blood
    • Receiving the blood from various parts of the body
    • None of the above

 

36. The atrio-ventricular valves of the heart is prevented from turning inside out by tough strands of connective tissue is called as
    • Tendinous cords
    • Tricuspid
    • Pocket valve
    • Mitral valve

 

37. Wenckebach phenomenon is seen in
    • Complete heart block
    • Partial heart block
    • Ventricular fibrillation
    • Myocardial infarction

 

38. Since it is the sinu-auricular node which initiates the impulses the heart of mammal is called
    • Cholinergic
    • Adrenergic
    • Neurogenic
    • Myogenic

 

39. Which one of the following doctors performed the first heart transplant
    • Hargovind Khorana
    • Christian Bernard
    • Watson
    • William Harvey

 

40. The tricuspid valve is present at the origin of
    • Carotid arch
    • Pulmonary arch
    • Truncus arteriosus
    • Systemic arch

 

41. Bicuspid and tricuspid valve are supported by
    • Columnae carnae
    • Endocardium
    • Chordae tendinae
    • Epicardium

 

42. What happens if the sympathetic nervous system is stimulated
    • Heartbeat increases
    • Cardiac output decreases
    • Blood pressure is lowered
    • Pulse becomes erratic and falls steadily

 

43. Sinus venosus is spread over
    • Dorsal surface of the heart of frog
    • Dorsal surface of the heart of rabbit
    • Ventral surface of the heart of frog
    • Ventral surface of the heart of rabbit

 

44. Renin is released by the kidney when the arterial blood pressure
    • Gets elevated
    • Becomes low
    • Remains constant
    • Becomes high

 

45. Cardiac output signifies
    • The amount of blood entering the heart per unit time
    • The amount of blood entering the lung per unit time
    • The amount of blood leaving the heart per unit time
    • The amount of blood leaving the lung per unit time

 

46. Normal diastolic pressure in young man is about
    • 20 mm Hg (b) 80 mm Hg (c) 110 mm Hg (d) 130 mm Hg

 

47. If glucose is to be injected in human blood, the property to be matched with glucose is
    • Density
    • Viscosity
    • Osmotic potential
    • Sugar group

 

48. Heart rate is increased by all the following except
    • Anoxia
    • Moderate excess
    • Elevated body temperature
    • Increased intracranial pressure CO₂

 

49. Uremia disease is associated with
    • High serum cholesterol
    • High blood glucose
    • High blood urea
    • Rh factor in blood

 

50. The heart beat increases at the time of interview due to
    • Corticotrophic hormone
    • Hyper secretion of renin
    • Secretion of adrenaline
    • Antidiuretic hormone secretion

 

51. An adult human with average health has systolic and diastolic pressure as
    • 80 mm Hg and 88 mm Hg
    • 70 mm Hg and 120 mm Hg
    • 120 mm Hg and 80 mm Hg
    • 50 mm Hg and 80 mm Hg

 

52. The thickening of walls of arteries are called
    • Arthritis
    • Aneurysm
    • Arteriosclerosis
    • Both (a) and (b)

 

53. Putting adrenaline on the heat will cause the heart beat to
    • Retard
    • Accelerate
    • Produce louder sound
    • Stop

 

54. Average cardiac output is
    • 4 litres per minute
    • 3 litres per minute
    • 3 litres per minute
    • 3 litres per minute

 

55. Heart beats are affected by
    • Carbon dioxide
    • Oxygen
    • Vagus nerve
    • All the above

 

56. We feel sleepy just after taking meals because
    • Blood pressure increases
    • Blood pressure decreases
    • Body weight increases
    • We feel lithargic

 

57. The pulse beat is measured by the
    • Artery (b) Capillary (c) Vein (d) None
58. Oxygenated blood is carried by
    • Pulmonary vein
    • Pulmonary artery
    • Renal vein
    • Hepatic portal vein

 

59. Blood to the heart is brought by the venous system by
    • Innominate and anterior abdominal
    • Subclavian alone
    • Vena cavae
    • Anterior abdominal alone

 

60. What is blood pressure
    • The pressure of blood on the heart muscle
    • The pressure of blood exerted on the walls of arteries and veins
    • The pressure of blood on the walls of veins only
    • The pressure of blood on the walls of arteries only

 

61. Valves are necessary in veins but not in arteries because
    • Blood flows with greater force in veins
    • Blood in veins flows without jerk
    • Blood from heart may not be pushed back into veins
    • Pressure in veins is low, which can flow the blood

 

62. The blood coming out of lungs is richer than that entering into lungs in
    • Oxygen (b) Carbon dioxide (c) (a) and (b) both (d) None of these

 

63. The veins
    • Have thick elastic walls
    • Contain valves
    • Are called resistance vessels
    • Store less blood than arteries

 

64. Pulmonary veins
    • Carry pure blood from heart to lungs
    • Carry impure blood from lungs to heart
    • Carry pure blood from lungs to heart
    • Carry impure blood to lungs

 

65. The posterior venacava
    • Divides into the hepatic portal veins
    • Opens into the left auricle
    • Commences at the kidney
    • Begins at the hind end of abdomen

 

66. Oxygenated blood is found in
    • Pulmonary veins
    • Pulmonary arteries
    • Right atrium
    • Right ventricle

 

67. Which is correct about veins
    • Valves are absent
    • Carry blood towards heart
    • Always carry oxygenated blood
    • Always carry deoxygenated blood

 

68. The blood vessel which brings oxygenated blood from lungs towards the heart of frog is
    • Pre caval (b) Post caval (c) Pulmonary vein (d) Pulmonary artery

 

69. When the right ventricle contracts the blood goes into
    • Aorta (b) Brain (c) Pulmonary artery (d) None

 

70. Arteries are
    • Thin-walled and blood flows under diminished pressure
    • Thick-walled and blood flows under high pressure
    • Thin-walled and blood flows under high pressure
    • Thick-walled and blood flows under diminished pressure

 

71. All arteries carry oxygenated blood except
    • Systemic (b) Hepatic (c) Pulmonary (d) Cardiac

 

72. The pre-caval veins collect blood from
    • Trunk and hind limbs
    • Fore limbs and hind limbs
    • Head and fore limbs
    • Head and hind limbs

 

73. What percent of total blood coming out of heart, goes to kidney
    • 25% (b) 50% (c) 75% (d) 40%

 

74. Vasa vasorum supplies blood to
    • Pericardium
    • Blood vessels
    • Tunica adventitia and external part of tunica media
    • Vas deferens

 

75. In the inguinal canal lies
    • Posterior mesentric artery
    • Spermatic artery
    • Internal carotid artery
    • Dorsal aorta

 

76. Which one of the following is found both in frog and in rabbit
    • Spinal accessory nerve
    • Diaphragm
    • Hepatic portal system
    • Eustachian tube

 

77. Largest blood vessel in body is
    • Carotid artery
    • Dorsal aorta
    • Phrenic artery
    • Coronary artery

 

78. Thrombosis in which coronary artery is met most frequency in MI
    • Right coronary artery
    • Left anterior descending artery
    • Left circumflex coronary artery
    • Right circumflex coronary artery

 

79. Systemic heart refers to
    • The two ventricles together in humans
    • The heart that contracts under stimulation from nervous system
    • Left auricle and left ventricle in higher vertebrates (d) Entire heart in lower vertebrates

 

80. The lymphatic fluid opens into the blood circulation via a duct into the
    • Artery supplying the spleen
    • Vein coming from liver
    • Jugular vein
    • Venacava near the heart

 

81. Which substance is more in blood flowing through hepatic vein than blood flowing through portal vein
    • Water (b) Urea (c) Fatty acid (d) Amino acid + oxygen

 

82. Carotid artery carries
    • Impure blood from brain
    • Oxygenated blood to anterior region of body or to brain
    • Impure blood to kidney
    • Oxygenated blood to heart

 

83. Innominate is
    • A nerve and artery
    • A muscle and artery
    • Skeleton part and artery
    • A nerve and vein

 

84. Clot of blood contains
    • Prothrombin (b) Thrombin (c) Fibrinogen (d) Fibrin

 

85. Which one of the following in blood absorbs oxygen
    • WBCs (b) Plasma (c) RBCs (d) Platelets

 

86. The protein which prevents coagulation of blood in the blood vessel is
    • Platelets (b) Globular protein (c) Albumin (d) Heparin

 

87. Oxygen is transported by
    • Blood plasma
    • RBCs
    • Leucocytes
    • Thrombocytes

 

88. White and red blood cells are formed in
    • Liver (b) Heart (c) Bone marrow (d) Spleen

 

89. Which of the following is the smallest blood particle
    • Leucocytes
    • Thrombocytes
    • Phagocytes
    • Erythrocytes

 

90. The fluid of the blood from which all blood corpuscles are removed is known as
    • Plasma (b) Vaccine (c) Haem (d) Serum

 

91. If an experiment, animal is made anaemic, production of which hormone will be stepped up
    • Erythrocytin (b) Erythroblastin (c) Erythropoietin (d) Enkephalin

 

92. Which one of the following substances in the blood in man imparts the oxygen carrying capacity to it
    • Haemocyanin
    • Haemoglobin
    • Haemerythrin or haemoerythrin
    • Sodium ions

 

93. The organs yolk sac, kidney, spleen, liver and bone marrow are
    • Erythropoietic (b) Red organs (c) Diapedic (d) (a) and (b)

 

94. de Castello and Sturli discovered
    • A blood group (b) B blood group (c) AB blood group (d) Rh blood group

 

95. Factors present on surface of RBC related to heredity are
    • Blood groups
    • Antigens
    • Antibodies
    • Haemoglobin

 

96. Blood dust present in the blood plasma is known as
    • Blood platelets
    • Chylomicrons
    • Haemoconia
    • Chyluria

 

97. One of the following cells can’t respire
    • Epidermal (b) Intestinal (c) Erythrocytes (d) Leucocytes

 

98. Rh factor is named after
    • Monkey (b) Drosphlla (c) Rat (d) Man

 

99. Blood sample of a healthy human being is
    • Acidic (b) Neutral (c) Alkaline (d) Variable

 

100. For safe blood transfusion
     • Donor’s RBC should not contain antibodies against recepient serum
     • Recepient serum should not contain antigens against donor’s antibodies
     • Recepient’s serum should not contain antibodies against RBC of donors
     • Receipient’s RBC should not contain antibodies against donor’s antigens

 

Answers:

1. D
2. D
3. C
4. A
5. C
6. A
7. D
8. D
9. B
10. B
11. A
12. C
13. B
14. B
15. A
16. D
17. D
18. D
19. A
20. C
21. C
22. A
23. B
24. A
25. D
26. A
27. B
28. D
29. D
30. C
31. A
32. A
33. C
34. D
35. A
36. A
37. B
38. D
39. B
40. B
41. C
42. A
43. A
44. B
45. C
46. B
47. C
48. D
49. C
50. C
51. C
52. C
53. B
54. C
55. D
56. B
57. 1
58. A
59. C
60. B
61. C
62. A
63. B
64. C
65. D
66. A
67. B
68. C
69. C
70. B
71. C
72. C
73. A
74. C
75. B
76. C
77. B
78. A
79. C
80. C
81. B
82. B
83. C
84. D
85. C
86. D
87. B
88. C
89. B
90. A
91. C
92. B
93. A
94. C
95. B
96. C
97. C
98. A
99. C
100. C