This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 486 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 486 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How long is our circulatory system? A) 100, 000 kms. B) 10, 000, 000 kms. C) 80, 000 kms. D) 65, 147 kms. Show Answer Correct Answer: A) 100, 000 kms. 2. Which cells are produced in the marrow of your bones? A) Red Blood Cells. B) White Blood Cells. C) Plasma. D) Platelets. Show Answer Correct Answer: A) Red Blood Cells. 3. The average human heart is the size of what? A) Hand. B) Fist. C) Knee. D) Foot. Show Answer Correct Answer: B) Fist. 4. Why the arteries usually has thick muscular wall but small lumen A) So that it could withstand the pulsing of blood as it is pumped through the heart. B) Small lumen bring the blood to close contact with the body cells. C) Because most the blood pressure is lost. D) None of above. Show Answer Correct Answer: A) So that it could withstand the pulsing of blood as it is pumped through the heart. 5. The circulatory system is made up of what? A) Heart, blood and blood vessels. B) Heart, arteries, brain. C) Blood and blood vessels. D) Heart and blood. Show Answer Correct Answer: A) Heart, blood and blood vessels. 6. Very tiny blood vessels are called: A) Arteries. B) Veins. C) Capillaries. D) None of the above. Show Answer Correct Answer: C) Capillaries. 7. Which of the following statements about blood pressure is NOT true? A) Expressed as a fraction. B) It is the pressure of blood pushing against the inner walls of blood vessels. C) Systolic pressure is the pressure in the arteries when the atria are contracting. D) Diastolic pressure is usually the lower number. Show Answer Correct Answer: C) Systolic pressure is the pressure in the arteries when the atria are contracting. 8. Which chamber receives blood from the upper right chamber and sends blood to the lungs? A) Right atrium. B) Right ventricle. C) Left atrium. D) Left ventricle. Show Answer Correct Answer: B) Right ventricle. 9. Tissue that flows through the circulatory system A) Myocardium. B) Blood. C) Mitral valve. D) O2. Show Answer Correct Answer: B) Blood. 10. This occurs when blood flow to part of the heart is blocked. A) Heart attack. B) Stroke. C) Arrhythmia. D) None of above. Show Answer Correct Answer: A) Heart attack. 11. Which statement does not give the function of the circulatory system? A) Circulates blood. B) Controls the functions of the heart. C) Transports nutrients, gases and hormones. D) Defends the body against pathogenic organisms. Show Answer Correct Answer: B) Controls the functions of the heart. 12. What happens in the lungs in the circulatory system? A) Oxygen is released into the blood, and carbon dioxide is removed. B) Oxygen is removed from the blood, and carbon dioxide is released. C) Blood is pumped to the lungs. D) Nutrients are absorbed. Show Answer Correct Answer: A) Oxygen is released into the blood, and carbon dioxide is removed. 13. Mitchell has been exercising and his face is Red. What is Vasodilation? A) This occurs when the artery walls increase in diameter. B) This occurs when the artery walls decrease in diameter. C) When the ARTERY IS FEELING IT. D) None of above. Show Answer Correct Answer: A) This occurs when the artery walls increase in diameter. 14. Which of these best describes the structure of an artery? A) Small lumen with valves. B) Small lumen and thick walls. C) No valves and walls one cell thick. D) Wide lumen and thin walls. Show Answer Correct Answer: B) Small lumen and thick walls. 15. The two bottom chambers are right and left ventricles. These pump blood out of the heart. A) True. B) False. Show Answer Correct Answer: A) True. 16. Brownian movement is seen in the following..... A) Multicellular organisms. B) Unicellular organisms ఏకకణ జీవులలో. C) Individual cells in multicellular organisms. D) 2&3. Show Answer Correct Answer: D) 2&3. 17. Veins carry deoxygenated blood back to the heart A) True. B) False. C) True, except for pulmonary veins, which carry oxygenated blood. D) None of above. Show Answer Correct Answer: C) True, except for pulmonary veins, which carry oxygenated blood. 18. Which blood vessel sends blood away from the heart to the rest of your body? A) Pulmonary artery. B) Pulmonary vein. C) Aorta. D) Superior vena cava. Show Answer Correct Answer: C) Aorta. 19. The heart is ..... size organ. A) Small. B) Fist. C) Big. D) None of these. Show Answer Correct Answer: B) Fist. 20. Blood from the Inferior and Superior Vena Cava empties into the: A) Right ventricle. B) Right atrium. C) Left ventricle. D) Left atrium. Show Answer Correct Answer: B) Right atrium. ← PreviousNext →Related QuizzesScience QuizzesCirculatory System Quiz 1Circulatory System Quiz 2Circulatory System Quiz 3Circulatory System Quiz 4Circulatory System Quiz 5Circulatory System Quiz 6Circulatory System Quiz 7Circulatory System Quiz 8Circulatory System Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books