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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

 

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

 

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

 

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

 

  1. 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

 

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

 

  1. 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

 

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

 

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

 

  1. 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

 

  1. 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

 

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

 

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

 

  1. What is the maximum efficiency of heart
    • 10 – 15 % (b) 20 – 25 % (c) 40 – 60% (d) 100%
  2. 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

 

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

 

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

 

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

 

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

 

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

 

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

 

  1. 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

 

  1. 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

 

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

 

  1. 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

 

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

 

  1. 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

 

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

 

  1. 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

 

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

 

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

 

  1. 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

 

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

 

  1. 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

 

  1. 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

 

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

 

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

 

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

 

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

 

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

 

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

 

  1. 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

 

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

 

  1. 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

 

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

 

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

 

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

 

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

 

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

 

  1. 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

 

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

 

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

 

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

 

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

 

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

 

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

 

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

 

  1. 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

 

  1. 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

 

  1. 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

 

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

 

  1. 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

 

  1. 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

 

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

 

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

 

  1. 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

 

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

 

  1. 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

 

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

 

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

 

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

 

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

 

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

 

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

 

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

 

  1. 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

 

  1. 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

 

  1. 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

 

  1. 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

 

  1. 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

 

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

 

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

 

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

 

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

 

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

 

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

 

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

 

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

 

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

 

  1. 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

 

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

 

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

 

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

 

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

 

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

 

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

 

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

 

  1. 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

 

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