This quiz works best with JavaScript enabled. Home > General Knowledge > Science > Biology > Circulatory System – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 21 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The heart is enclosed in a double layered membrane called A) Pericardium membrane. B) Pericardial membrane. C) Pleural membrane. D) None of the above. Show Answer Correct Answer: A) Pericardium membrane. 2. Which of the following is the second stop along the electrical conduction pathway? A) Purkinje Fibers. B) AV Node. C) Because of the difference. D) Bundle of His. Show Answer Correct Answer: B) AV Node. 3. Which of the following is the function of the capillaries? A) Breaks down food into nutrients. B) Sends signals to the brain. C) Pumps blood to the rest of the body. D) Delivers oxygen to the cells and collects CO2 waste. Show Answer Correct Answer: D) Delivers oxygen to the cells and collects CO2 waste. 4. When the heart contracts blood is pushed into tubes called what? A) Blood vessels. B) Blood veins. C) Nerves. D) Blood straws. Show Answer Correct Answer: A) Blood vessels. 5. Which of these valves is on the left side of the heart? A) Tricuspid. B) Ventricle. C) Bicuspid. D) Atrium. Show Answer Correct Answer: C) Bicuspid. 6. What is the function of the blood vessels and capillaries? A) They pump blood to the heart. B) They filter impurities from the blood. C) They carry blood to all parts of the body. D) They carry messages from the brain to the muscles. Show Answer Correct Answer: C) They carry blood to all parts of the body. 7. Types of Anemia- A) Aplastic. B) Pernicious. C) Sickle Cell. D) All of the above. Show Answer Correct Answer: D) All of the above. 8. The MAIN function of the circulatory system is to A) Move materials throughout the body. B) Fight infections and heal wounds. C) Give blood oxygen. D) Keep the heart beating. Show Answer Correct Answer: A) Move materials throughout the body. 9. The trachea is also known as A) The lungs. B) The windpipe. C) The bronchi. D) The esophagus. Show Answer Correct Answer: B) The windpipe. 10. The pelvic girdle protects our: A) Delicate organs present in the upper part of our body. B) Delicate organs present in the lower part of the body. Show Answer Correct Answer: B) Delicate organs present in the lower part of the body. 11. Contain haemoglobin A) Platelet. B) White blood cell. C) Plasma. D) Red blood cell. Show Answer Correct Answer: D) Red blood cell. 12. In what blood vessel are substances (like oxygen) transported directly into organ tissues? A) Capillaries. B) Red blood cells. C) Arteries. D) Veins. Show Answer Correct Answer: A) Capillaries. 13. The main organ of the circulatory system is the (a) A) Blood. B) A heart. C) Vein. D) Liver. Show Answer Correct Answer: B) A heart. 14. This is responsible for protecting you from illness and disease A) Red Blood Cells. B) Blood Vessels. C) Capillaries. D) White Blood Cells. Show Answer Correct Answer: D) White Blood Cells. 15. The microcirculation of blood in the proper human is ..... A) Left ventricle-pulmonary artery-lungs-pulmonary veins-right atrium. B) Right ventricle-pulmonary artery-lung-pulmonary vein-right atrium. C) Left ventricle-pulmonary vein-lung-pulmonary artery-right atrium. D) Right ventricle-pulmonary vein-lung-pulmonary artery-right atrium. E) Right ventricle-pulmonary artery-lungs-pulmonary veins-left atrium. Show Answer Correct Answer: E) Right ventricle-pulmonary artery-lungs-pulmonary veins-left atrium. 16. The smallest blood vessels in our body. A) Capillaries. B) Arteries. C) Heart. D) Veins. Show Answer Correct Answer: A) Capillaries. 17. Choose the best description of anemia. A) Deficient hemoglobin content. B) Blood cells are sickle shaped and have difficultly carrying sufficient oxygen. C) White blood cells attack self cells. D) Blood clots in an unbroken blood vessel. Show Answer Correct Answer: A) Deficient hemoglobin content. 18. What are the three types of blood vessels and their functions? A) Arteries, veins, and capillaries. B) Aorta, pulmonary artery, vena cava. C) Red blood cells, white blood cells, platelets. D) Left atrium, right ventricle, pulmonary valve. Show Answer Correct Answer: A) Arteries, veins, and capillaries. 19. Thin blood vessels in the body. A) Arteries. B) Veins. C) Blood capillaries. D) None of above. Show Answer Correct Answer: B) Veins. 20. Which of the following is not a part of stethoscope? A) Diaphragm. B) Eyepiece. C) Chest piece. D) Earpiece. Show Answer Correct Answer: B) Eyepiece. 21. What do we call the smallest blood vessels in our bodies? A) Tissues. B) Capillaries. C) Cells. D) Atoms. Show Answer Correct Answer: B) Capillaries. 22. When we breath in (inhalation) A) The diaphragm contracts and descends. there is more space for air to fill the lungs. B) The diaphragm relaxes and rises. it pushes the air out of the lungs. Show Answer Correct Answer: A) The diaphragm contracts and descends. there is more space for air to fill the lungs. 23. The lymphatic system is unlike the circulatory system because it is a A) One-way system. B) System that contains white blood cells. C) Closed system. D) Simple system. Show Answer Correct Answer: A) One-way system. 24. Veins carry blood ..... A) Away from the heart. B) Back to the heart. C) Into cells. D) None of above. Show Answer Correct Answer: B) Back to the heart. 25. What is the hormone that stimulates platelet formation A) Erythropoietin. B) Interleukin. C) Thrombopoietin. D) None of above. Show Answer Correct Answer: C) Thrombopoietin. 26. What is the function of the veins in the circulatory system? A) Carry deoxygenated blood from the body to the heart. B) Carry oxygenated blood from the heart to the body. C) Carry deoxygenated blood from the heart to the lungs. D) Carry oxygenated blood from the lungs to the heart. Show Answer Correct Answer: A) Carry deoxygenated blood from the body to the heart. 27. Where can you find a synapse? A) Inside the nucleus of a neuron. B) Between a neuron's dendrite and its terminal. C) Between separate neurons. D) Surrounding the body of a neuron. Show Answer Correct Answer: C) Between separate neurons. 28. Happens when the brain does not receive enough blood A) Arteriosclerosis. B) Heart attack. C) Caring for your circulation system. D) Strokes. Show Answer Correct Answer: D) Strokes. 29. Which type of circulation sends blood from the heart to the lungs and back, picking up oxygen?Carbon dioxide and other waste are released into the blood in the alveoli sac. A) Systemic circulation. B) Pulmonary circulation. Show Answer Correct Answer: B) Pulmonary circulation. 30. Blood enters the right atrium from the A) Pulmonary vein. B) Vena cava. C) Right ventricla. D) Right atrium. Show Answer Correct Answer: B) Vena cava. 31. What causes blood pressure? A) The force with which the ventricles contract. B) The speed at which oxygen is returned to blood in the lungs. C) The strength of the muscles in the walls of the capillaries. D) The rate at which blood flows through the heart. Show Answer Correct Answer: A) The force with which the ventricles contract. 32. Within the lungs, the exchange of oxygen and carbon dioxide occurs between the ..... and the capillaries. A) Alveoli. B) Bronchioles. C) Bronchi. D) None of above. Show Answer Correct Answer: A) Alveoli. 33. Which one is not a blood vessel? A) Capillaries. B) Plasma. C) Arteries. D) Veins. Show Answer Correct Answer: B) Plasma. 34. Which type of muscle is found in the heart? A) Striated muscle. B) Smooth muscle. C) Cardiac muscle. D) Skeletal muscle. Show Answer Correct Answer: C) Cardiac muscle. 35. What abbreviation refers to the presence of certain proteins? A) A. B) AA. C) Rh sector. D) Rh factor. Show Answer Correct Answer: D) Rh factor. 36. Contraction and relaxation of the heart is due to ..... A) Fatigued heart muscles. B) Electrical impulse. C) Neverending heartbeats. D) Atriosinal Node. Show Answer Correct Answer: B) Electrical impulse. 37. The right side of the heart carries A) Oxygen rich blood. B) Oxygen poor blood. Show Answer Correct Answer: B) Oxygen poor blood. 38. Where does deoxygenated blood return for oxygenation in the circulatory system? A) Kidneys. B) Lungs. C) Stomach. D) Liver. Show Answer Correct Answer: B) Lungs. 39. ..... have very thin walls so gases and nutrients can easily pass through them to the cells. A) Plasmas. B) Capillaries. C) Veins. D) Arteries. Show Answer Correct Answer: B) Capillaries. 40. HUMAN HEART CONTAINS..... CHAMBERS. A) 1. B) 3. C) 2. D) 4. Show Answer Correct Answer: D) 4. 41. Membrane that surrounds the lungs A) Pleural membrane. B) Pericardium. C) Septum. D) Alveolus. Show Answer Correct Answer: A) Pleural membrane. 42. WE CARRY OXIGENLLEVAMOS EL OXÍGENO A) PLASMA. B) RED CELLS. C) WHITE CELLS. D) PLATELETS. Show Answer Correct Answer: B) RED CELLS. 43. Heart Attack occurs when A) The blood supply to the heart is restricted. B) The heart beats irregularly. C) Blood flow to the brain is interrupted. D) The heart can no longer maintain its regular pumping rate. Show Answer Correct Answer: A) The blood supply to the heart is restricted. 44. Which of these blood samples most likely came from the left ventricle? A) Sample A (bright red blood cells). B) Sample B (dark red blood cells). C) Both samples could have come from the left ventricle. D) Neither sample could have come from the left ventricle. Show Answer Correct Answer: A) Sample A (bright red blood cells). 45. State True or False:Arteries are made up of thinner walls and veins are made up of Thicker walls. A) True. B) False. C) Cant Say. D) None of above. Show Answer Correct Answer: B) False. 46. The heart is the shape of our closed fist A) False. B) True. Show Answer Correct Answer: B) True. 47. Structure(s) that keep the blood flowing in one direction. A) Cilia. B) Villi. C) Bronchioles. D) Valves. Show Answer Correct Answer: D) Valves. 48. Artery wall are thick. A) Arteries. B) Veins. C) Capillaries. D) None of above. Show Answer Correct Answer: A) Arteries. 49. What are the bottom two chambers of the heart called? A) Valves. B) Atria. C) Aorta. D) Ventricles. Show Answer Correct Answer: D) Ventricles. 50. Right side of the heart is high in A) O2. B) Ill. C) H. D) C. Show Answer Correct Answer: B) Ill. 51. A person with type A blood can safely receive ..... A) Type A only. B) Type A and B. C) Type A and O. D) Type AB and Type O. Show Answer Correct Answer: C) Type A and O. 52. A thick substance that forms to stop bleeding A) Veins. B) Arteries. C) Heartbeat. D) Clot. Show Answer Correct Answer: D) Clot. 53. What returns in the veins to the lungs for the body to get rid of? A) Oxygen. B) Helium. C) Gold. D) Carbon dioxide. Show Answer Correct Answer: D) Carbon dioxide. 54. What is the name of the problem that causes a fatty build up in the walls of blood vessels? A) Atherosclerosis. B) Angina. C) Heart failure. D) Stroke. Show Answer Correct Answer: A) Atherosclerosis. 55. How many components are in our blood? A) 1. B) 2. C) 4. D) 3. Show Answer Correct Answer: C) 4. 56. What is the color of oxygen-rich blood? A) Yellow. B) Blue. C) Green. D) Red. Show Answer Correct Answer: D) Red. 57. The systemic circuit ..... A) Picks up oxygen and releases carbon dioxide. B) Drops off oxygen and picks up carbon dioxide. C) Provides blood to lung tissue only. D) Makes your skin red when you get hot. Show Answer Correct Answer: B) Drops off oxygen and picks up carbon dioxide. 58. The largest artery which carries pure blood away from heart A) Superior venacava. B) Pulmonary vein. C) Pulmonary artery. D) Aorta. Show Answer Correct Answer: D) Aorta. 59. What vocabulary word means an iron-containing protein that binds chemically to oxygen molecules? A) Hemoglobin. B) Plasma. C) Leukocytes. D) Red blood cells. Show Answer Correct Answer: A) Hemoglobin. 60. What is the function of the heart? A) Protects organs and produces red blood cells. B) Generates heat. C) Breaks down food into nutrients. D) The heart is a pump, which moves the blood. The arteries and veins are the pipes where the blood flows. Show Answer Correct Answer: D) The heart is a pump, which moves the blood. The arteries and veins are the pipes where the blood flows. ← 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