This is a collection of Past MCQs of Physiology on the topic Cardiovascular System. Very Useful for AIIMS, PGIMER, AIPGEE, COMEDK, NBDE, NDEB, ADA, etc
5. # The first heart sound is produced by the :
A. Closure of the aortic and pulmonary valves
B. Opening of the aortic and pulmonary valves
C. Closure of the mitral and tricuspid valves
D. Opening of the mitral and tricuspid valves
www.dentaldevotee.blogspot.com
6. # The first heart sound is produced by the :
A. Closure of the aortic and pulmonary valves
B. Opening of the aortic and pulmonary valves
C. Closure of the mitral and tricuspid valves
D. Opening of the mitral and tricuspid valves
www.dentaldevotee.blogspot.com
7. # Parasympathetic stimulation of heart causes:
A. SA node decreases firing
B. Increased AV node excitability
C. Decreased ventricular contraction
D. Tachycardia
www.dentaldevotee.blogspot.com
8. # Parasympathetic stimulation of heart causes:
A. SA node decreases firing
B. Increased AV node excitability
C. Decreased ventricular contraction
D. Tachycardia
www.dentaldevotee.blogspot.com
9. # Normally, the rate of the heart beat in a human is
determined by:
A. Bundle of His
B. all cardiac muscles
C. the SA node
D. the cervical ganglion
www.dentaldevotee.blogspot.com
10. # Normally, the rate of the heart beat in a human is
determined by:
A. Bundle of His
B. all cardiac muscles
C. the SA node
D. the cervical ganglion
www.dentaldevotee.blogspot.com
11. # The ventricular repolarisation in ECG is best seen in:
A. "P" wave
B. "Q" wave
C. "R" wave
D. "T" wave
www.dentaldevotee.blogspot.com
12. # The ventricular repolarisation in ECG is best seen in:
A. "P" wave
B. "Q" wave
C. "R" wave
D. "T" wave
www.dentaldevotee.blogspot.com
13. # Stroke output of each ventricle in normal adult is :
A. 30 ml
B. 130 ml
C. 70 ml
D. 5 liters
www.dentaldevotee.blogspot.com
14. # Stroke output of each ventricle in normal adult is :
A. 30 ml
B. 130 ml
C. 70 ml
D. 5 liters
www.dentaldevotee.blogspot.com
15. # Cardiac output is a measure of :
A. Peripheral resistance * tissue fluid
B. Peripheral resistance * cardiac rate
C. Blood pressure * Cardiac rate
D. Heart rate * Stroke volume
www.dentaldevotee.blogspot.com
16. # Cardiac output is a measure of :
A. Peripheral resistance * tissue fluid
B. Peripheral resistance * cardiac rate
C. Blood pressure * Cardiac rate
D. Heart rate * Stroke volume
www.dentaldevotee.blogspot.com
17. # Cardiac output is not affected by :
A. Heart rate
B. Peripheral resistance
C. Systolic blod pressure
D. Venous return
www.dentaldevotee.blogspot.com
18. # Cardiac output is not affected by :
A. Heart rate
B. Peripheral resistance
C. Systolic blod pressure
D. Venous return
www.dentaldevotee.blogspot.com
19. # The largest function of the total peripheral resistance is
due to:
A. Venules
B. Arterioles
C. Capillaries
D. Precapillary sphincters
www.dentaldevotee.blogspot.com
20. # The largest function of the total peripheral resistance is
due to:
A. Venules
B. Arterioles
C. Capillaries
D. Precapillary sphincters
www.dentaldevotee.blogspot.com
21. # All the heart valves are open during which stage of cardiac
cycle?
A. Systolic ejection
B. Isovolumetric relaxation
C. Isovolumetric contraction
D. None of the above
www.dentaldevotee.blogspot.com
22. # All the heart valves are open during which stage of cardiac
cycle?
A. Systolic ejection
B. Isovolumetric relaxation
C. Isovolumetric contraction
D. None of the above
www.dentaldevotee.blogspot.com
23. # Minimum blood Pressure is in:
A. Aorta
B. Arteries
C. Capillaries
D. Venules
www.dentaldevotee.blogspot.com
24. # Minimum blood Pressure is in:
A. Aorta
B. Arteries
C. Capillaries
D. Venules
www.dentaldevotee.blogspot.com
25. # Starling's law of the heart
A. Does not operate in the failing heart
B. Does not operate during exercise
C. Explains the increase in cardiac output that occurs when
venous return is increased
D. Explains the increase in cardiac output when the
sympathetic nerves supplying the heart are stimulated
www.dentaldevotee.blogspot.com
26. # Starling's law of the heart
A. Does not operate in the failing heart
B. Does not operate during exercise
C. Explains the increase in cardiac output that occurs when
venous return is increased
D. Explains the increase in cardiac output when the
sympathetic nerves supplying the heart are stimulated
www.dentaldevotee.blogspot.com
27. # Which of the followings is true ?
A. Starling's law of heart states that increase in force of
contraction is directly related to cardiac output
B. Starling's law of heart states that the force of ventricular
contraction is directly related to the end diastolic volume
C. Both A and B
D. None of the above
www.dentaldevotee.blogspot.com
28. # Which of the followings is true ?
A. Starling's law of heart states that increase in force of
contraction is directly related to cardiac output
B. Starling's law of heart states that the force of ventricular
contraction is directly related to the end diastolic volume
C. Both A and B
D. None of the above
www.dentaldevotee.blogspot.com
29. # Peripheral resistance is maximum in:
A. Aorta
B. Artery
C. Arteriole
D. Vein
www.dentaldevotee.blogspot.com
30. # Peripheral resistance is maximum in:
A. Aorta
B. Artery
C. Arteriole
D. Vein
www.dentaldevotee.blogspot.com
31. # Stimulatuion of baroreceptor leads to :
A. Increased blood pressure, Increased heart rate
B. Decreased BP, decreased heart rate
C. Increased BP, decreased heart rate
D. Decreased BP, Increased heart rate
www.dentaldevotee.blogspot.com
32. # Stimulatuion of baroreceptor leads to :
A. Increased blood pressure, Increased heart rate
B. Decreased BP, decreased heart rate
C. Increased BP, decreased heart rate
D. Decreased BP, Increased heart rate
www.dentaldevotee.blogspot.com
33. # Increased functional demand on the heart produces
increased size of the myocardium by:
A. Hyperplasia
B. Hypertrophy
C. Fatty infiltration
D. Increased amounts of fibrous connective tissue
www.dentaldevotee.blogspot.com
34. # Increased functional demand on the heart produces
increased size of the myocardium by:
A. Hyperplasia
B. Hypertrophy
C. Fatty infiltration
D. Increased amounts of fibrous connective tissue
www.dentaldevotee.blogspot.com
35. # Cardiac index is related to :
A. Cardiac output and body weight
B. Cardiac output and body surface area
C. Cardiac output and work of the heart
D. Stroke volume and pulse rate
www.dentaldevotee.blogspot.com
36. # Cardiac index is related to :
A. Cardiac output and body weight
B. Cardiac output and body surface area
C. Cardiac output and work of the heart
D. Stroke volume and pulse rate
www.dentaldevotee.blogspot.com
37. # Absolute refractory period in heart :
A. Lasts till cardiac contraction
B. Longer than refractory period in skeletal muscle
C. A phase of cardiac cycle in which heart cannot be
stimulated by any amount of stimulus
D. Corresponds with duration of action potential
E. All of the above
www.dentaldevotee.blogspot.com
38. # Absolute refractory period in heart :
A. Lasts till cardiac contraction
B. Longer than refractory period in skeletal muscle
C. A phase of cardiac cycle in which heart cannot be
stimulated by any amount of stimulus
D. Corresponds with duration of action potential
E. All of the above
www.dentaldevotee.blogspot.com
39. # Closure of the aortic valve occurs before the following
event:
A. Isovolumetric contraction
B. Isovolumetric relaxation
C. Prediastole
D. Presystole
www.dentaldevotee.blogspot.com
40. # Closure of the aortic valve occurs before the following
event:
A. Isovolumetric contraction
B. Isovolumetric relaxation
C. Prediastole
D. Presystole
www.dentaldevotee.blogspot.com
41. # Conduction velocity is least in:
A. AV node
B. SA Node
C. Purkinje fibers
D. Budele of His
www.dentaldevotee.blogspot.com
42. # Conduction velocity is least in:
A. AV node
B. SA Node
C. Purkinje fibers
D. Budele of His
www.dentaldevotee.blogspot.com
43. # Fastest conducting tissue in human heart:
A. AV node
B. SA node
C. Bundle of His
D. Purkinje fibers
www.dentaldevotee.blogspot.com
44. # Fastest conducting tissue in human heart:
A. AV node
B. SA node
C. Bundle of His
D. Purkinje fibers
www.dentaldevotee.blogspot.com
45. # Under resting condition, the cardiac output is ____ L/min:
A. 2.5
B. 4.25
C. 5.25
D. 9.5
www.dentaldevotee.blogspot.com
46. # Under resting condition, the cardiac output is ____ L/min:
A. 2.5
B. 4.25
C. 5.25
D. 9.5
www.dentaldevotee.blogspot.com
47. # Coronary blood flow is usually predominantly controlled by :
A. Auto regulation
B. Hormones
C. Parasympathetic impulses
D. Sympathetic impulse
www.dentaldevotee.blogspot.com
48. # Coronary blood flow is usually predominantly controlled by :
A. Auto regulation
B. Hormones
C. Parasympathetic impulses
D. Sympathetic impulse
www.dentaldevotee.blogspot.com
49. # Cardiac output in L/min divided by heart rate equals:
A. Cardiac efficiency
B. Cardiac index
C. Mean Stroke volume
D. Mean arterial pressure
www.dentaldevotee.blogspot.com
50. # Cardiac output in L/min divided by heart rate equals:
A. Cardiac efficiency
B. Cardiac index
C. Mean Stroke volume
D. Mean arterial pressure
www.dentaldevotee.blogspot.com
51. # Cardiac cycle duration in man is:
A. 0.4 sec
B. 0.8 sec
C. 1.2 sec
D. 1.6 sec
www.dentaldevotee.blogspot.com
52. # Cardiac cycle duration in man is:
A. 0.4 sec
B. 0.8 sec
C. 1.2 sec
D. 1.6 sec
www.dentaldevotee.blogspot.com
53. # First heart sound occurs during the period of:
A. Isotonic relaxation
B. Isovolumetric relaxation
C. Isovolumetric contraction
D. Isotonic contraction
www.dentaldevotee.blogspot.com
54. # First heart sound occurs during the period of:
A. Isotonic relaxation
B. Isovolumetric relaxation
C. Isovolumetric contraction
D. Isotonic contraction
www.dentaldevotee.blogspot.com
55. # Absolute period when whole heart is in diastole is :
A. 0.7 sec
B. 0.3 sec
C. 0.2 sec
D. 0.4 sec
www.dentaldevotee.blogspot.com
56. # Absolute period when whole heart is in diastole is :
A. 0.7 sec
B. 0.3 sec
C. 0.2 sec
D. 0.4 sec
www.dentaldevotee.blogspot.com
57. # The effects of adrenaline on heart are all except :
A. Increases heart rate
B. Decreases myocardial irritability
C. Increases force of contraction
D. Increases oxygen uptake by heart
www.dentaldevotee.blogspot.com
58. # The effects of adrenaline on heart are all except :
A. Increases heart rate
B. Decreases myocardial irritability
C. Increases force of contraction
D. Increases oxygen uptake by heart
www.dentaldevotee.blogspot.com
59. # Cardiac output is maximum to :
A. Liver
B. Brain
C. Kidney
D. Heart
www.dentaldevotee.blogspot.com
60. # Cardiac output is maximum to :
A. Liver
B. Brain
C. Kidney
D. Heart
www.dentaldevotee.blogspot.com
61. # Increase in carotid sinus pressure produces:
A. Reflex hyperpnea
B. Reflex bradycardia
C. Reflex tachycardia
D. Reflex hypercapnia
www.dentaldevotee.blogspot.com
62. # Increase in carotid sinus pressure produces:
A. Reflex hyperpnea
B. Reflex bradycardia
C. Reflex tachycardia
D. Reflex hypercapnia
www.dentaldevotee.blogspot.com
63. # Effect on force of contraction of heart is :
A. Chronotropic effect
B. Dromotropic efffect
C. Bathmotropic effect
D. Inotropic effect
www.dentaldevotee.blogspot.com
64. # Effect on force of contraction of heart is :
A. Chronotropic effect
B. Dromotropic efffect
C. Bathmotropic effect
D. Inotropic effect
www.dentaldevotee.blogspot.com
65. # SA node acts as a pacemaker of the heart because of the
fact that it:
A. is capable of generating impulses
B. has rich sympathetic innervations
C. has poor cholinergic innervations
D. generates impulses at the highest rate
www.dentaldevotee.blogspot.com
66. # SA node acts as a pacemaker of the heart because of the
fact that it:
A. is capable of generating impulses
B. has rich sympathetic innervations
C. has poor cholinergic innervations
D. generates impulses at the highest rate
www.dentaldevotee.blogspot.com
67. # Distribution of blood flow is mainly regulated by the :
A. Arteries
B. Arterioles
C. Capillaries
D. Venules
www.dentaldevotee.blogspot.com
68. # Distribution of blood flow is mainly regulated by the :
A. Arteries
B. Arterioles
C. Capillaries
D. Venules
www.dentaldevotee.blogspot.com
69. # The following factors increase the cardiac output except:
A. Preload
B. Afterload
C. Heart rate
D. Myocardial contractility
www.dentaldevotee.blogspot.com
70. # The following factors increase the cardiac output except:
A. Preload
B. Afterload
C. Heart rate
D. Myocardial contractility
www.dentaldevotee.blogspot.com
71. # Ventricular muscle receives impulses directly from the:
A. Purkinje system
B. Bundle of His
C. Right and left bundle branches
D. AV node
www.dentaldevotee.blogspot.com
72. # Ventricular muscle receives impulses directly from the:
A. Purkinje system
B. Bundle of His
C. Right and left bundle branches
D. AV node
www.dentaldevotee.blogspot.com
73. # In determining blood pressure by auscultatory method,
A. The loudest sound is the diastolic pressure
B. Systolic pressure estimation tends to be lower than those
made by palpatory method
C. The first sound heard is systolic pressure
D. The sounds that are heard are generated in heart
www.dentaldevotee.blogspot.com
74. # In determining blood pressure by auscultatory method,
A. The loudest sound is the diastolic pressure
B. Systolic pressure estimation tends to be lower than those
made by palpatory method
C. The first sound heard is systolic pressure
D. The sounds that are heard are generated in heart
www.dentaldevotee.blogspot.com
75. # Isovolumetric relaxation ends immediately after:
A. AV valve closes
B. When ventricular pressure falls below aortic pressure
C. When ventricular pressure falls below atrial pressure
D. None of the above
www.dentaldevotee.blogspot.com
76. # Isovolumetric relaxation ends immediately after:
A. AV valve closes
B. When ventricular pressure falls below aortic pressure
C. When ventricular pressure falls below atrial pressure
D. None of the above
www.dentaldevotee.blogspot.com
77. # Glomerular capillary pressure differ from other capillaries
of body in:
A. Higher filtration pressure
B. Lower filtration pressure
C. Both of the above
D. None
www.dentaldevotee.blogspot.com
78. # Glomerular capillary pressure differ from other capillaries
of body in:
A. Higher filtration pressure
B. Lower filtration pressure
C. Both of the above
D. None
www.dentaldevotee.blogspot.com
79. # The hemoglobin oxygen saturation of blood entering the
right ventricle is approximately:
A. 97 percent
B. 85 percent
C. 75 percent
D. 53 percent
www.dentaldevotee.blogspot.com
80. # The hemoglobin oxygen saturation of blood entering the
right ventricle is approximately:
A. 97 percent
B. 85 percent
C. 75 percent
D. 53 percent
www.dentaldevotee.blogspot.com
81. # Which of the following increases turbulence in blood flow ?
A. Reynolds number <2000
B. Decrease in viscosity of blood
C. Decrease in density of blood
D. Increase in diameter of blood vessel
www.dentaldevotee.blogspot.com
82. # Which of the following increases turbulence in blood flow ?
A. Reynolds number <2000
B. Decrease in viscosity of blood
C. Decrease in density of blood
D. Increase in diameter of blood vessel
www.dentaldevotee.blogspot.com
83. # In the case of heart muscle , all are true except:
A. Acts as syncytium
B. Has multiple nuclei
C. has gap junctions
D. has branching
www.dentaldevotee.blogspot.com
84. # In the case of heart muscle , all are true except:
A. Acts as syncytium
B. Has multiple nuclei
C. has gap junctions
D. has branching
www.dentaldevotee.blogspot.com
85. # The velocity of conduction in the purkinje fibers of the
heart is :
A. 1 to 4 m/s
B. 5 to 8 m/s
C. 9 to 12 m/s
D. more than 12 m/s
www.dentaldevotee.blogspot.com
86. # The velocity of conduction in the purkinje fibers of the
heart is :
A. 1 to 4 m/s
B. 5 to 8 m/s
C. 9 to 12 m/s
D. more than 12 m/s
www.dentaldevotee.blogspot.com
87. # Second heart sound is characterized by all except:
A. due to closure of semilunar valves
B. is occasionally split
C. has longer duration than first heart sound
D. marks the onset of diastole
www.dentaldevotee.blogspot.com
88. # Second heart sound is characterized by all except:
A. due to closure of semilunar valves
B. is occasionally split
C. has longer duration than first heart sound
D. marks the onset of diastole
www.dentaldevotee.blogspot.com
89. # What is common between systemic and pulmonary
circulation?
A. Volume of the circulation per minute
B. Peripheral vascular resistance
C. Pulse pressure
D. Total capacity
www.dentaldevotee.blogspot.com
90. # What is common between systemic and pulmonary
circulation?
A. Volume of the circulation per minute
B. Peripheral vascular resistance
C. Pulse pressure
D. Total capacity
www.dentaldevotee.blogspot.com
91. # Stimulation of the baroreceptors results in :
A. Increase in heart rate
B. Decreased vagal discharge
C. Increased sympathetic discharge
D. Decrease in blood pressure
www.dentaldevotee.blogspot.com
92. # Stimulation of the baroreceptors results in :
A. Increase in heart rate
B. Decreased vagal discharge
C. Increased sympathetic discharge
D. Decrease in blood pressure
www.dentaldevotee.blogspot.com
93. # The function of carotid body is :
A. Measures the change in pO2 in arterial blood
B. Measures pO2 in venous blood
C. Measures the change in CO2 in arterial blood
D. Measures the change in CO2 in venous blood
www.dentaldevotee.blogspot.com
94. # The function of carotid body is :
A. Measures the change in pO2 in arterial blood
B. Measures pO2 in venous blood
C. Measures the change in CO2 in arterial blood
D. Measures the change in CO2 in venous blood
www.dentaldevotee.blogspot.com
95. # The dicrotic notch on the aortic pressure curve is caused by :
A. Closure of the pulmonary valve
B. Rapid filling of the left ventricle
C. Closure of the aortic valve
D. Contraction of the aorta
www.dentaldevotee.blogspot.com
96. # The dicrotic notch on the aortic pressure curve is caused by :
A. Closure of the pulmonary valve
B. Rapid filling of the left ventricle
C. Closure of the aortic valve
D. Contraction of the aorta
www.dentaldevotee.blogspot.com
97. # Peripheral vascular resistance is best given by :
A. Mean arterial pressure responsible for blood flow to organ
B. Diastolic blood pressure as it decreases till mid-thoracic
aorta
C. Pulse pressure as it relates to stroke volume and aortic
compliance
D. Systolic pressure as it increase in descending aorta
www.dentaldevotee.blogspot.com
98. # Peripheral vascular resistance is best given by :
A. Mean arterial pressure responsible for blood flow to organ
B. Diastolic blood pressure as it decreases till mid-thoracic
aorta
C. Pulse pressure as it relates to stroke volume and aortic
compliance
D. Systolic pressure as it increase in descending aorta
www.dentaldevotee.blogspot.com
99. Share and
Subscribe for
More MCQs
Contact: raman.dhungel@gmail.com
www.facebook.com/DentCareNepal
www.dentaldevotee.blogspot.com
www.youtube.com/DentCareNepal
www.dentaldevotee.blogspot.com