Competitive Cardiovascular System ( Physiology ) MCQs – Medical MCQs
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Latest Medical MCQs
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Latest Cardiovascular System ( Physiology ) Mcqs
The most occurred mcqs of Cardiovascular System ( Physiology ) in past papers. Past papers of Cardiovascular System ( Physiology ) Mcqs. Past papers of Cardiovascular System ( Physiology ) Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Cardiovascular System ( Physiology ) Mcqs. The Important series of Cardiovascular System ( Physiology ) Mcqs are given below:
Stimulation of baroreceptors results in_______________?
A. Decreased vagal discharge
B. Increase in heart rate
C. Increased sympathetic discharge
D. Decrease in blood pressure
2nd heart sound is characterized by all except______________?
A. Is occasionally split
B. Due to closure of semilunar valves
C. Has longer duration than 1st heart sound
D. Marks the onset of diastole
Heart muscle, true are all except_______________?
A. Has gap junctions
B. Has multiple nuclei
C. Act as syncytium
D. Has branching
Isovolumetric relaxation ends immediately after________________?
A. When ventricular pressure falls below aortic pressure
B. AV Valve closes
C. When ventricular pressure falls below atrial pressure
D. None of the above
Ventricular muscle receives impulses directly from the_______________?
A. Purkinje system
B. Right and left bundle branches
C. Bundle of HIS
D. AV node
Distribution of blood flow is mainly regulated by the________________?
A. Capillaries
B. Arterioles
C. Arteries
D. Venules
Effect on force of contraction of heart is_____________?
A. Dromotropic effect
B. Chronotropic effect
C. Bathmotropic
D. Ionotropic effect
Cardiac output is maximum to _________________?
A. Liver
B. Kidney
C. Brain
D. Heart
Absolute period when whole heart is in diastole is______________?
A. 0.3 seconds
B. 0.7 seconds
C. 0.7 seconds
D. 0.4 seconds
Cardiac cycle duration in man is_______________?
A. 1.2 seconds
B. 0.8 seconds
C. 0.4 seconds
D. 1.6 seconds
Coronary blood flow is usually predominantly controlled by_____________?
A. Auto regulation
B. Parasympathetic impulses
C. Hormones
D. Sympathetic impulse
Fastest conducting tissue in human heart _________________?
A. SA node
B. AV node
C. Bundle of His
D. Purkinje fibers
Closure of aortic valve occurs before the following event_______________?
A. Pre-diastole
B. Isovolumetric relaxation
C. Isovolumetric contraction
D. Pre-systole
Cardiac index is related to ______________?
A. Cardiac output and work of the heart
B. Cardiac output and body surface area
C. cardiac output and body weight
D. Stroke volume and pulse rate
Hematology MCQs
Stimulation of barorceptor leads to ________________?
A. Increased B.P, decreased heart rate
B. Decreased B.P , decreased heart rate
C. Increased blood pressure, increased heart rate
D. Decreased B.P, increased heart rate
Consider the following statements________________?
A. Staling’s law of heart states that the force of ventricular contraction is directly related to the end diastolic volume
B. Starling’s law of heart states that increase in force of contraction is directly related to cardiac ouput
C. Both A and B
D. None of the above
Minimum blood pressure is in_____________?
A. Arteries
B. Aorta
C. Capillaries
D. Venules
The largest function of the total peripheral resistance is due to _________________?
A. Capillaries
B. Arterioles
C. Venules
D. Precapillary sphincters
Cardiac output is a measure of______________?
A. Peripheral resistance X cardiac rate
B. Peripheral resistance X tissue fluid
C. Blood pressure X cardiac rate
D. Heart rate X blood volume
The ventricular repolarization in ECG is best seen in_______________?
A. “Q” wave
B. “P” wave
C. “R” wave
D. “T” wave
Parasympathetic stimulation of heart causes______________?
A. SA node decreases firing
B. Decreased ventricular contraction
C. Increased AV node excitability
D. Tachycardia
The dicrotic notch on the aortic pressure curve is caused by_________________?
A. Rapid filling of the left ventricle
B. Closure of the pulmonary valve
C. Closure of the aortic valve
D. Contraction of the atria
The function of Carotid body is_______________?
A. Measures the change in Po2 in arterial blood
B. Measures the changed in CO2 in arterial blood
C. Measures Po2 in venous blood
D. Measures the change in CO2 in venous blood
What is common between systemic and pulmonary circulation is_____________?
A. Volume of the circulation per minute
B. Pulse Pressure
C. Peripheral vascular resistance
D. Total Capacity
The velocity of conduction in the Purkinjie fibers of the heart is__________________?
A. 1 to 4 m/sec
B. 9 to 12 m/sec
C. 5 to 8 m/sec
D. More than 12 m/sec
Which of the following increases turbulence in blood flow ?
A. Decrease in velocity of blood
B. Reynolds number < 2000
C. Decrease in density of blood
D. Increase in diameter of blood vessel
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 of the above
In determining blood pressure by auscultatory method_____________?
A. The sounds that are heard are generated in heart
B. Systolic pressure estimation tends to be lower than those make by palpatory method
C. The first sound heard is the systolic pressure
D. The loudest sound is the diastolic pressure
The following factors increase the cardiac output except______________?
A. Heart rate
B. After load
C. Preload
D. Myocardial contractility
SA node acts as a pacemaker of the heart because of the fact that it_________________?
A. Has rich sympathetic innervation
B. is capable of generating impulses
C. Has poor cholinergic innervation
D. Generates impulses at the highest rate
Increase in carotid sinus pressure produces__________________?
A. Reflex tachycardia
B. Reflex Hypercapnia
C. Reflex hyperpnea
D. Reflex Hypercapnia
The effects of Adrenaline on heart are all except__________________?
A. Increases force of contraction
B. Decreases myocardial irritability
C. Increases heart rate
D. Increases oxygen uptake by heart
Endocrinology MCQs
First heart sound occurs during the period of________________?
A. Isovolumetric relaxation
B. Isotonic relaxation
C. Isovolumetric contraction
D. Isotonic contraction
Cardiac output in L/min divided by heart rate equals_______________?
A. Cardiac index
B. Cardiac efficiency
C. Mean stroke volume
D. Mean arterial pressure
Under resting condition the cardiac output is _______ L/ min ?
A. 4.25
B. 2.5
C. 5.25
D. 9.5
Conduction velocity is least in_______________?
A. AV node
B. SA node
C. SA node
D. Purkinje fibers
Absolute refractory period in heart______________?
A. Longer than refractory period in skeletal muscle
B. Lasts till cardiac contraction
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
Increased functional demand on the heart produces increased size of the myocardium by _______________?
A. Fatty infiltration
B. Hypertrophy
C. Hyperplasia
D. Increased amounts of fibrous connective tissue
Peripheral resistance is maximum in_______________?
A. Artery
B. Aorta
C. Arteriole
D. Vein
Starling’s law of the heard________________?
A. Does not operate during exercise
B. Does not operate in the failing heart
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 stimulated
All the heart valves are open during which stage of cardiac cycle __________________?
A. Isovolumetric relaxation
B. Systolic ejection
C. Isovolumetric contraction
D. None of the above
Cardiac output is not affected by __________________?
A. Peripheral resistance
B. Heart rate
C. Systolic blood pressure
D. Venous return
Stroke output of each ventricle in normal adult is_____________?
A. 130 ml
B. 30 ml
C. 70 ml
D. 5 liters
Normally, the rate of the heart beat in a human is determined by _________________?
A. All cardiac muscle
B. The bundle of His
C. The sinoatrial node
D. The cervical ganglion
The first heart sound is produced by the_____________?
A. Opening of the aortic and pulmonary valves
B. Closure of the aortic and pulmonary valves
C. Closure of the mitral and tricuspid valves
D. Opening of the mitral and tricuspid valves