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Body Fluids and Circulation MCQs | Body Fluids and Circulation Objective Type Questions with Answers

(1) SA node is located in _____
[A] upper lateral wall of right atrium
[B] lower lateral wall of left atrium
[C] lower lateral wall of right atrium
[D] upper lateral wall of left atrium
Answer: upper lateral wall of right atrium
(2) “Bundle of HIS” is made up of _________
[A] nervous tissue supplied to ventricles
[B] nervous tissue supplied to heart
[C] muscular tissue supplied to heart
[D] muscular tissue supplied to ventricles
Answer: muscular tissue supplied to ventricles
(3) Blood enters into the heart because of muscles of _______
[A] atria relax
[B] ventricles contract
[C] ventricles relax
[D] atria contract
Answer: atria relax
(4) The opening of right atrium into right ventricle is guarded by _______
[A] mitral valve
[B] tricuspid valve
[C] bicuspid valve
[D] aortic semilunar valve
Answer: tricuspid valve
(5) Mitral valve is present between __________
[A] right atrium and left ventricle
[B] right and left ventricle
[C] left ventricle and aorta
[D] left atrium and left ventricle
Answer: left atrium and left ventricle
(6) Cardiac output is determined by _______
[A] heart rate
[B] stroke volume
[C] blood flow
[D] heart rate and stroke volume
Answer: heart rate and stroke volume
(7) In human being the duration of cardiac cycle is ___________
[A] 0.008 sec
[B] 0.5 sec
[C] 0.8 sec
[D] 8 sec
Answer: 0.8 sec
(8) The volume of blood each ventricle pumps out during a cardiac cycle is about ___________
[A] 70 ml
[B] 5000 ml
[C] 7 L
[D] 1200 ml
Answer: 70 ml
(9) What is the definition of the cardiac cycle?
[A] The contraction of the atria
[B] Circulation of the blood in the heart
[C] The contraction and relaxation of the ventricles
[D] It is a sequence of event that occurs during one complete heartbeat
Answer: It is a sequence of event that occurs during one complete heartbeat
(10) Name the three phases of cardiac cycle in the order ____________
[A] early diastole, mid-to-late diastole, ventricular systole
[B] ventricular systole, mid-to-late diastole, Early diastole
[C] mid-to-late diastole, Ventricular systole, Early diastole
[D] early diastole, Ventricular systole, mid-to-late diastole
Answer: mid-to-late diastole, Ventricular systole, Early diastole
(11) An electrocardiogram is a graphic illustration of ____________
[A] cardiac conduction system
[B] cardiac cycle
[C] cardiac output
[D] systemic and pulmonary circuits
Answer: cardiac conduction system
(12) The P wave of the ECG represents _______________
[A] ventricular depolarization
[B] atrial depolarization
[C] ventricular repolarization
[D] atrial systole
Answer: atrial depolarization
(13) Which of the following is not true for ventricular systole?
[A] The ventricles relax
[B] The ventricles contract
[C] The semi lunar valves close
[D] The atrioventricular valves open
Answer: The ventricles relax
(14) The two distinct heart sounds during the cardiac cycle are lub and dup.
[A] True
[B] False
Answer: True
(15) Heart beat initiates from ________
[A] Purkinji fibers
[B] SA node
[C] Bundle of HIS
[D] Auriculo ventricular node
Answer: SA node
(16) An artificial pace maker is implanted and connected to the heart in patients ___________
[A] suffering from arteriosclerosis
[B] having high blood pressure
[C] with irregularity in heart rhythm
[D] having 90% blockage
Answer: with irregularity in heart rhythm
(17) A heat murmurs indicates a defective ___________
[A] Heart valves
[B] Bundle of HIS
[C] SA node
[D] AV node
Answer: Heart valves
(18) Choose the correct pathway of the transmission of impulses in heart beat.
[A] AV node- SA node- Bundle of HIS- Purkinji fibres
[B] SA node- AV node- Bundle of HIS- Purkinji fibres
[C] SA node- Bundle of HIS- AV node- Purkinji fibres
[D] SA node Purkinji fibres- Bundle of HIS- AV node
Answer: SA node- AV node- Bundle of HIS- Purkinji fibres
(19) In ECG the depolarization of atria is indicated by __________
[A] P wave
[B] Q wave
[C] R wave
[D] S wave
Answer: P wave
(20) Which of the following pair is correctly matched?
[A] Dup- Sudden opening of semilunar valves at the beginning of ventricle diastole
[B] Lubb- Sharp closing of AV valves at the beginning of ventricular systole
[C] Pulsation of radial artery valves in blood vessels
[D] Initiation of heart beat- Purkinji fibers
Answer: Lubb- Sharp closing of AV valves at the beginning of ventricular systole

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