This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 1 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Letter D is known as the A) Right Atrium. B) Right Ventricle. C) Left Atrium. D) Left Ventricle. Show Answer Correct Answer: A) Right Atrium. 2. Who discovered the ABO and Rh blood groups? A) Oliver. B) Decastello. C) Landsteiner. D) Balthazard. Show Answer Correct Answer: C) Landsteiner. 3. The septum prevents the ..... A) Backflow of blood from the left ventricle to the left atrium. B) Mixing of oxygen-rich blood with carbon dioxide-rich blood. C) Backflow of blood from the right ventricle to the right atrium. D) Backflow of blood from the aorta to the left ventricle. Show Answer Correct Answer: B) Mixing of oxygen-rich blood with carbon dioxide-rich blood. 4. The heart is a muscle. A) True. B) False. Show Answer Correct Answer: A) True. 5. ..... is a chronic disease needing lifelong managementoccurs when the heart muscle doesn't pump blood as well as it should. When this happens, blood often backs up and fluid can build up in the lungs, causing shortness of breath. A) Myocardial Infarction. B) Stroke. C) Angina Pectoris. D) High Cholesterol. E) Heart Failure. Show Answer Correct Answer: E) Heart Failure. 6. The lower two chambers of the heart A) Valves. B) Atria. C) Ventricles. D) Septum. Show Answer Correct Answer: C) Ventricles. 7. Also known as high blood pressure. it can be measured using an instrument called sphygmomanometer A) Hypertension. B) Arteriosclerosis. C) Anemia. D) Varicose veins. Show Answer Correct Answer: A) Hypertension. 8. If the arteries are narrow and hard, the blood prrssure is likely to be ..... than normal A) Higher. B) Lower. Show Answer Correct Answer: A) Higher. 9. How thick are capillaries? A) One blood cell thick. B) Thicker than arterioles but thinner than arteries. C) A few blood cells thick. D) Thicker than venules but thinner than veins. Show Answer Correct Answer: A) One blood cell thick. 10. Which of these orders the heart's chambers correctly? (hint:which way does blood flow?) A) Right atrium > Right ventricle > Left atrium > Left ventricle. B) Right atrium > Left ventricle > Left atrium > Right ventricle. C) Right atrium > Left atrium > Right ventricle > Left ventricle. D) Right ventricle > Left ventricle > Right atrium > Left atrium. E) No order, blood flows randomly. Show Answer Correct Answer: A) Right atrium > Right ventricle > Left atrium > Left ventricle. 11. The main organ of the Circulatory System A) Lungs. B) Heart. C) Stomach. D) What's the Circulatory System?. Show Answer Correct Answer: B) Heart. 12. Anterior end of heart is ..... while posterior end ..... A) Narrow. Broad. B) Broad. Narrow. C) Narrow. Narrow. D) Broad. Broad. Show Answer Correct Answer: B) Broad. Narrow. 13. In normal people, how many times per minute does the heart beat on average? A) 85 times. B) 75 times. C) 60 times. D) 90 times. Show Answer Correct Answer: B) 75 times. 14. I am the 'liquid' portion of blood. A) Erythrocytes. B) Thrombocytes. C) Leukocytes. D) Plasma. Show Answer Correct Answer: D) Plasma. 15. Iron Deficiency Anemia A) Cardiovascular system. B) Lymphatic system. Show Answer Correct Answer: A) Cardiovascular system. 16. When someone is exercising, which is most likely a function of both the circulatory and respiratory systems A) To help the body sweat. B) To make the muscles work. C) To provide oxygen to the body. D) To protect bones from breaking. Show Answer Correct Answer: C) To provide oxygen to the body. 17. When blood leaves the left atrium, where does it go next? A) Aorta. B) Left ventricle. C) Right atrium. D) Pulmonary artery. Show Answer Correct Answer: B) Left ventricle. 18. Order the phases an action potential travels in the conduction system A) SA node$\rightarrow$ AV bundle branches$\rightarrow$ AV node$\rightarrow$ Purkinje fibers. B) SA node$\rightarrow$ AV node$\rightarrow$ AV bundle branches$\rightarrow$ Purkinje fibers. C) AV bundle branches$\rightarrow$ AV node$\rightarrow$ SA node$\rightarrow$ Purkinje fibers. D) Purkinje fibers$\rightarrow$ SA node$\rightarrow$ AV node$\rightarrow$ AV bundle branches. Show Answer Correct Answer: B) SA node$\rightarrow$ AV node$\rightarrow$ AV bundle branches$\rightarrow$ Purkinje fibers. 19. Pacemaker is A) Instrument for measuring heart beat. B) Instrument for measuring pulse rate. C) Auriculo-ventricular node that provides impulse for heart beat. D) Sinu-aurical node that provides impulse for heart beat. Show Answer Correct Answer: D) Sinu-aurical node that provides impulse for heart beat. 20. .... carry the blood away from the heart and the 2 ..... return the blood back to the heart. A) 1. Arteries 2. Veins. B) 1. Veins 2. Arteries. Show Answer Correct Answer: A) 1. Arteries 2. Veins. Next →Related QuizzesScience QuizzesCirculatory System Quiz 2Circulatory System Quiz 3Circulatory System Quiz 4Circulatory System Quiz 5Circulatory System Quiz 6Circulatory System Quiz 7Circulatory System Quiz 8Circulatory System Quiz 9Circulatory System Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books