This quiz works best with JavaScript enabled. Home > General Knowledge > Science > Biology > Circulatory System – Quiz 23 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 23 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A deposit of fatty or fibrous material in a blood vessel wall. A) Platelets. B) Cholesterol. C) Fat. D) Plaque. Show Answer Correct Answer: D) Plaque. 2. It is another term for red blood cells. A) Erythrocytes. B) Thrombocytes. C) Plasma. D) Leucocytes. Show Answer Correct Answer: A) Erythrocytes. 3. These blood vessels (pipes) are where blood cells (delivery trucks) pick up AND drop off their cargo (oxygen, water, carbon dioxide, glucose) A) Veins. B) Arteries. C) Capillaries. D) None of above. Show Answer Correct Answer: C) Capillaries. 4. These blood cells clot your blood. A) Red blood cells. B) Epithelial cells. C) White blood cells. D) Platelets. Show Answer Correct Answer: D) Platelets. 5. It has the power that propels blood through the blood vessels A) Heart. B) Capillaries. C) Arteries. D) Veins. Show Answer Correct Answer: A) Heart. 6. Arteries take blood away from the heart. A) TRUE. B) FALSE. Show Answer Correct Answer: A) TRUE. 7. The blood vessels that emerge from the heart are called ..... A) Arteries. B) Veins. C) Blood capillaries. D) None of above. Show Answer Correct Answer: A) Arteries. 8. What vocabulary word means a tiny blood vessel where substances between the blood and body cells? A) Artery. B) Vein. C) Capillary. D) None of above. Show Answer Correct Answer: C) Capillary. 9. In which system of the body does the heart belong to? A) Circulatory system. B) Nervous system. C) Skeletal system. D) Digestive system. Show Answer Correct Answer: A) Circulatory system. 10. The function of the left ventricle is to deliver A) Deoxygenated blood to the pulmonary vein. B) Oxygenated blood to the aorta. C) Oxygenated blood to the left atrium. D) Deoxygenated blood to the pulmonary artery. Show Answer Correct Answer: B) Oxygenated blood to the aorta. 11. The heart wall is composed of ..... layers of tissue. A) 3. B) 4. C) 2. D) 1. Show Answer Correct Answer: A) 3. 12. The blood component, platelets, job is what? A) Carry oxygen. B) Blood clotting. C) Fight infection. D) Carry nutrients. Show Answer Correct Answer: B) Blood clotting. 13. RBC does not contain nucleus? A) True. B) False. Show Answer Correct Answer: A) True. 14. A boy is bitten by a venomous snake on his left leg. Poison gets to his heart through the: A) Pulmonary vein. B) Left subclavian artery. C) Superior vena cava. D) Inferior vena cava. Show Answer Correct Answer: D) Inferior vena cava. 15. Composed of a layer of endothelium A) Arteries (pulses) [6]. B) Venous Vessels (Back) [6]. C) Capillaries [5]. D) None of above. Show Answer Correct Answer: C) Capillaries [5]. 16. Heart contains valves to ..... A) Separate the two sides. B) To prevent mixing blood. C) To allow blood flows in one direction. D) None of above. Show Answer Correct Answer: C) To allow blood flows in one direction. 17. In most arteries you would find ..... A) Deoxygenated blood. B) Oxygenated blood. Show Answer Correct Answer: B) Oxygenated blood. 18. What type of muscle is the heart made of? A) Skeletal. B) Contracted. C) Cardiac. D) Smooth. Show Answer Correct Answer: C) Cardiac. 19. Small, rounded masses of lymphatic tissue located in the pharynx and in the passage from the mouth to the pharynx A) Spleen. B) Tonsils. C) Lymph nodes. D) Thymus. Show Answer Correct Answer: B) Tonsils. 20. Which side of the heart receives oxygen rich blood? A) Right. B) Left. C) Both. D) Niether. Show Answer Correct Answer: B) Left. 21. De oxygenated in veins A) Systematic veins. B) Pulmonary veins. Show Answer Correct Answer: A) Systematic veins. 22. The universal acceptor ..... A) AB-. B) AB+. C) O-. D) O+. Show Answer Correct Answer: B) AB+. 23. What is the sound called when blood pumps throughout your body? A) Annoying. B) A heartbeat. C) Thumping. D) None of above. Show Answer Correct Answer: B) A heartbeat. 24. The heart ..... I. pumps oxygenated blood to the lungs II. pumps deoxygenated blood to the rest of the body III. pumps deoxygenated blood to the lungs IV. pumps oxygenated blood to the rest of the body A) I and II only. B) I and IV only. C) II and III only. D) III and IV only. Show Answer Correct Answer: D) III and IV only. 25. What are arteries? A) Capillaries. B) Ventricles. C) Veins. D) Blood vessels. Show Answer Correct Answer: D) Blood vessels. 26. A population of mice lives in a barn community. A cat population has just joined the community. What will happen? A) Mouse and cat populations both go up?. B) Mouse and cat populations both go down. C) Mouse population goes down as cat population goes up. D) Mouse population goes up as cat population goes down. Show Answer Correct Answer: C) Mouse population goes down as cat population goes up. 27. Plasma is made up of what percent of water? A) 92%. B) 93%. C) 95%. D) 82%. Show Answer Correct Answer: A) 92%. 28. Which one does not form part of the structure of the heart? A) Pulmonary Artery. B) Left Ventricle. C) Vena Cava. D) Alveoli. Show Answer Correct Answer: D) Alveoli. 29. The "lub sound" of the heart is due to: A) The Mitral and Tricuspid valves just opened. B) The Mitral and Tricuspid valves just snapped shut. C) The Pulmonary and Aortic valves just snapped shut. D) None of the above. Show Answer Correct Answer: B) The Mitral and Tricuspid valves just snapped shut. 30. Which is a type of anemia A) Ascites. B) Edema. C) Iron deficiency. D) Hemoglobin. Show Answer Correct Answer: C) Iron deficiency. 31. An organ of the system A) Liver. B) Cell. C) Heart. D) None of above. Show Answer Correct Answer: C) Heart. 32. Heart beats are accelerated by ..... A) Cranial nerves and acetylcholine. B) Sympathetic nerves and acetylcholine. C) Cranial nerves and adrenaline. D) Sympathetic nerves and epinephrine. Show Answer Correct Answer: D) Sympathetic nerves and epinephrine. 33. Makes up the 55% of blood A) Blood cells. B) Plasma. Show Answer Correct Answer: B) Plasma. 34. The direction of blood flow through the human body is maintained by: A) The elasticity of the vein walls. B) The pump action of the heart. C) Muscular contractions. D) A system of valves. Show Answer Correct Answer: D) A system of valves. 35. Which are the smallest blood vessels? A) Arteries. B) Capillaries. C) Veins. D) None of above. Show Answer Correct Answer: B) Capillaries. 36. Which function prevents blood from flowing back from the aorta back into the heart? A) Pulmonary Semilunar Valve. B) Tricuspid valve. C) Aortic Semilunar Valve. D) Bicuspid valve. Show Answer Correct Answer: C) Aortic Semilunar Valve. 37. Nadia has blood type A-. Which of her following friends can donate blood to her? A) Vicky O-. B) Luigi 0+. C) Miranda A+. D) Nick AB-. Show Answer Correct Answer: A) Vicky O-. 38. What is the MOST abundant component of blood? A) Plasma. B) Thrombocytes. C) Leukocytes. D) Erythrocytes. Show Answer Correct Answer: A) Plasma. 39. How many chambers a heart have? A) 2. B) 3. C) 1. D) 4. Show Answer Correct Answer: D) 4. 40. Heart is an organ which beats continuously to act as a pump for transport of blood, which carries other substances. The heart is located in the chest cavity with its lower tip slightly tilted towards the left. Your heart is roughly the size of your fist. Pulse is due to A) Blood flowing in arteries. B) Blood flowing in veins. C) Blood flowing through capillaries. D) None of these. Show Answer Correct Answer: A) Blood flowing in arteries. 41. The circulatory system is said to be complete because ..... A) Oxygenated and oxygen-poor blood never mix. B) Oxygenated and oxygen-poor blood always mix. C) Oxygenated and oxygen-poor blood are found everywhere. D) Oxygenated and oxygen-poor blood have the same colour. Show Answer Correct Answer: A) Oxygenated and oxygen-poor blood never mix. 42. What is the name of the instrument we use to hear the heart/ A) B/p cuff. B) Pulse ox. C) Thermometer. D) Stethoscope. Show Answer Correct Answer: D) Stethoscope. 43. What is the fluid of the circulatory system? A) Water. B) Blood. C) Milk. D) All of these. Show Answer Correct Answer: B) Blood. 44. To which chamber of the heart does blood arrive from the lungs? A) Left Atrium. B) Left Ventricle. C) Right Ventricle. D) Right Atrium. Show Answer Correct Answer: A) Left Atrium. 45. How many main functions does the circulatory system have? A) 3. B) 1. C) 2. D) 4. Show Answer Correct Answer: A) 3. 46. Organs are not related to the circulatory system. A) Liver. B) Kidneys. C) Heart. D) Hand. Show Answer Correct Answer: D) Hand. 47. Tiny blood vessel that connects arteries to veins A) Arteries. B) Capillaries. C) Atherosclerosis. D) Veins. Show Answer Correct Answer: B) Capillaries. 48. It transports materials and removes waste from cells and to the specific excretory organs. A) Arteries. B) Blood vessels. C) Blood. D) Heart. Show Answer Correct Answer: C) Blood. 49. An electrocardiogram with QRS waves is produced by which step? A) The SA node stimulates the atria. B) The ventricles of the heart relax. C) The ventricles of the heart are stimulated to contract. D) AV node sends signal. Show Answer Correct Answer: C) The ventricles of the heart are stimulated to contract. 50. The functions of the circulatory system are A) To carry waste products from the body's cells. B) To deliver vital substances to the body's cells. C) To fight diseases. D) All of the above. Show Answer Correct Answer: D) All of the above. 51. Which component of the blood protects the body against pathogens? A) Erythrocytes. B) Thrombocytes. C) Leukocytes. D) None of above. Show Answer Correct Answer: C) Leukocytes. 52. Which of the following valves is the third valve that the blood will correctly flow through? A) Pulmonary Valve. B) Tricuspid Valve. C) Aortic Valve. D) Mitral Valve. Show Answer Correct Answer: D) Mitral Valve. 53. What will Sidney do to care for her muscles and her heart? A) She will sleep late and eat Twinkies. B) She will walk and jog every day as well as eat healthy foods. C) She will skip rope and eat potato chips. D) None of above. Show Answer Correct Answer: B) She will walk and jog every day as well as eat healthy foods. 54. The narrow tube that branched from the trachea connected to each of the two lungs A) Cilia. B) Bronchi. C) Veins. D) Epiglottis. Show Answer Correct Answer: B) Bronchi. 55. It protects the other organs of the body. A) Immune System. B) Muscular System. C) Cardiovascular System. D) Skeletal System. Show Answer Correct Answer: D) Skeletal System. 56. To maintain cardiovascular health, foods high in fat should be avoided because? A) Fat in the diet harms red blood cells. B) They decrease the force with which the ventricles can contract. C) They can lead to atherosclerosis. D) They make the blood flow more rapidly than normal. Show Answer Correct Answer: C) They can lead to atherosclerosis. 57. If the SA Node is damaged another spot on the heart can "take over" the pacemaker role ..... what do we call one of these spots if they occur? A) AV Node. B) Ectopic Pacemaker. C) QRS Complex. D) Purkinje Fiber. Show Answer Correct Answer: B) Ectopic Pacemaker. 58. Which system circulates between the heart and the lungs? A) Pulmonary. B) Systolic. C) Diastolic. D) Systemic. Show Answer Correct Answer: A) Pulmonary. 59. What is the role of plasma in the blood? A) Plasma is involved in the production of red blood cells. B) Carries nutrients, hormones, and waste products. C) Plasma is responsible for carrying oxygen to the body. D) Plasma helps in muscle movement. Show Answer Correct Answer: B) Carries nutrients, hormones, and waste products. 60. Which blood vessel walls are the thickest? A) Arteries. B) Veins. C) Capillaries. D) None of above. Show Answer Correct Answer: A) Arteries. ← PreviousNext →Related QuizzesScience QuizzesGeneral Knowledge QuizzesCirculatory System Quiz 1Circulatory System Quiz 2Circulatory System Quiz 3Circulatory System Quiz 4Circulatory System Quiz 5Circulatory System Quiz 6Circulatory System Quiz 7Circulatory System Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books