MCQ CVS Physiology
- 1. ميحرلا نمحرلا هللا بسم CARDIOVASCULAR PHYSIOLOGY MULTIPLE CHOICE QUESTIONS FOR 1ST STAGE NURSING STUDENTS. MARCH 2023/ DR. RAGHDA BASIL ALKHATEEB (LECTURER) 1# 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 2# Normally cardiac cycle takes complete. A. 0.1 second B. 0.08 second C.0.01 second D. 0.8 second
- 2. 3# Thickest layer in heart is: A. Epicardium B. Endocardium C. Pericardium D. Myocardium 4#Blood supply to heart vessels is by: A. Vasa vasorum B. Vasa nervosum C. Blood flowing through the vessels D. Both a and c 5#Chordae tendinae is found in: A. Auricles of the heart B. Ventricles of the brain C. Sinus venous D. Ventricles of the heart
- 3. 6# The two major opening of the left ventricle are: A. Pulmonary vein and aorta B. Tricuspid valve and pulmonary artery C. Bicuspid valve and aorta D. Inferior vena cava and aorta 7# The pacemaker of heart is: A. SA node B. AV node C. Bundle of His D. Purkinje Fibers 8# Aorta pierces the diaphragm at the level of: A. T8 B. TIO C.T12 D. C6
- 4. 9# Which of the following vitamins has closest relationship with blood? A. Vit A B. Vit D C. Vit E D. Vit K 10# Diaphragm is supplied by arteries. A. Coronary B. Phrenic C. Renal D. Vasa vasorum 11# The first branch of the human aorta is: A. Brachiocephalic artery B. Coronary artery C. Left common carotid artery
- 5. D. Left subclavian artery 12#The innermost layer of the blood vessels is made up of: A. Ciliated epithelium B. Endothelium C. Columnar epithelium D. Squamous (pavement) epithelium 13# The longest vein in the human body is: A. Inferior vena cava B. Subclavian C. Long saphenous D. Jugular 14# The instrument used to measure blood pressure is known as: A. Electrocardiograph
- 6. B. Barometer C. Manometer D. Sphygmomanometer 15# The velocity of flow in blood vessels is determined by: A. caliber of blood vessel B. viscosity of blood C. pressure difference between two ends of blood vessels D. all of the above 16# About percent of the total cardiac output goes to the kidney. A. 10% B. 15%
- 7. C. 25% D. 30% 17#Bradycardia occurs in: A. Pilots B. Athletes C. Surgeons D. Chess players 18#CCU stands for: A. Cardiac care unit B. Coronary care unit C. Cancer care unit D. Cardiological care unit 19# Which of the following procedures is used to assess the human blood vessel? A. Angiography
- 8. B. Tomography C. Venography D. Electromyography 20# Blood pressure is higher in: A. infants B. adolescents C.adults D. aged people 21# Which of the following has single layer of endothelial structure? A. Arteries B. Veins C. Capillaries D. Lymphatic vessels
- 9. 22# A patient with high fever will most likely demonstrate the sign of: A. increased pulse rate B. increased appetite C. decreased sweating D. increased urinary output 23# Least blood pressure is at: A. Vein B. Vena cava C. Aorta D. Capillary 24# Arteries are: A. thin walled and blood flows under diminished pressure B. thick walled and blood flows under high pressure C. thin walled and blood flows under high pressure D. thick walled and blood flows under diminished Pressure
- 10. 25# The blood in the mammalian heart pumped by the right ventricle pass out of orifice, which is guarded by: A. Tricuspid valve B. Bicuspid valve C. Pulmonary valve D. Aortic arch 26# Blood clot inside a blood vessel is known as: A. Thrombus B. Fibrinolysis C. Thrombosis D. Clot
- 11. 27# Hepatic portal system originates from: A. Liver B. Kidney C. Diaphragm D. Different parts of alimentary canal 28# Parasympathetic stimulation of heart causes: A.SA node decreases firing B.Increased AV node excitability C.Decreased ventricular contraction D.Tachycardia 29# 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
- 12. 30#The ventricular repolarisation in ECG is best seen in: A."P" wave B."Q" wave C."R" wave D."T" wave 31# Stroke output of each ventricle in normal adult is : A.30 ml B.130 ml C.70 ml D.5 liters 32#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
- 13. 33#The largest function of the total peripheral resistance is due to: A.Venules B.Arterioles C.Capillaries D.Precapillary sphincters 34# 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 35#Minimum blood Pressure is in: A.Aorta B.Arteries C.Capillaries D.Venules
- 14. 36# 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 37#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
- 15. 38# Peripheral resistance is maximum in: A.Aorta B.Artery C.Arteriole D.Vein 39# Stimulation 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 40# 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
- 16. 41# 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 42# What is the definition of afterload? A.The pressure that ventricles must overcome to eject blood B.The degree to which cardiac muscle cells are stretched just before they contract C.The contractile strength at the given muscle length, independent of muscle stretch and end-diastolic volume D.The pressure that the atria must overcome to eject blood
- 17. 43# Closure of the aortic valve occurs before the following event: A.Isovolumetric contraction B.Isovolumetric relaxation C.Prediastole D.Presystole 44#Conduction velocity is least in: A.AV node B.SA Node C.Purkinje fibers D.Bundle of His 45# Fastest conducting tissue in human heart: A.AV node B.SA node C.Bundle of His D.Purkinje fibers
- 18. 46# Under resting condition, the cardiac output is A. 2.5 B. 4.25 C. 5.25 D. 9.5 L/min 47# Coronary blood flow is usually predominantly controlled by: A.Auto regulation B.Hormones C.Parasympathetic impulses D.Sympathetic impulse 48#Cardiac output in L/min divided by heart rate equals: A.Cardiac efficiency B.Cardiac index C.Mean Stroke volume D.Mean arterial pressure
- 19. 49#Cardiac cycle duration in man is: A.0.4 sec B.0.8 sec C.1.2 sec D.1.6 sec 50# First heart sound occurs during the period of A.Isotonic relaxation B.Isovolumetric relaxation C.Isovolumetric contraction D.Isotonic contraction 51#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 52 #Cardiac outputs is maximum to: A.Liver
- 20. B.Brain C.Kidney D.Heart 53# Effect on force of contraction of heart is: A.Chronotropic effect B.Dromotropic efffect C.Bathmotropic effect D.Inotropic effect 54#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 55#Distribution of blood flow is mainly regulated by the: A.Arteries B.Arterioles C.Capillaries D.Venules
- 21. 56# Ventricular muscle receives impulses directly from the: A.Purkinje system B.Bundle of His C.Right and left bundle branches D.AV node 57# 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 58#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
- 22. 59# The hemoglobin oxygen saturation of blood entering the right ventricle is approximately: A.97 percent B.85 percent C.75 percent D.53 percent 60# 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 61# 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
- 23. 62# 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 63# Stimulation of the baroreceptors results in: A.Increase in heart rate B.Decreased vagal discharge C.Increased sympathetic discharge D.Decrease in blood pressure 64# The function of carotid body is: A.Measures the change in pO2 in arterial blood B.Measures p02 in venous blood C.Measures the change in CO2 in arterial blood D.Measures the change in CO2 in venous blood ****The carotid body is a 2 to 6 mm, round bilateral sensory organ in the peripheral nervous system located in the adventitia of the bifurcation of the common carotid artery. (Chemoreceptor). *****The carotid sinus usually appears as a dilation of the lower end of the internal carotid in late adolescence and functions as a baroreceptor.
- 24. 65#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 66# Which one of the heart sounds heard in elderly and pathologic in the young? A. First heart sound B. Second heart sound C. Third heart sound
- 25. D. Fourth heart sound ANSWERS: 1. C 2. D 3. D 4. D 5. D 6. C 7. A 8. C 9. D 10. B 11. B 12. B 13. C 14. D 15. D 16. C 17. B 18. B 19. A 20. D 21. C 22. A 23. B
- 26. 24. B 25. C 26. A 27. D 28. A 29. C 30. D 31. C 32. D 33. B 34. D 35. D 36. C 37. C 38. C 39. B 40. B 41. E 42. A 43. B 44. A 45. D 46. C 47. C 48. C 49. B 50. C
- 27. 51. D 52. A 53. D 54. D 55. B 56. A 57. C 58. C 59. C 60. B 61. C 62. A 63. D 64. A 65. C 66. D