This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 71 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 71 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. De oxygenated in veins A) Pulmonary veins. B) Systematic veins. Show Answer Correct Answer: B) Systematic veins. 2. The universal acceptor ..... A) O+. B) O-. C) AB+. D) AB-. Show Answer Correct Answer: C) AB+. 3. 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. 4. 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. 5. What are arteries? A) Veins. B) Blood vessels. C) Ventricles. D) Capillaries. Show Answer Correct Answer: B) Blood vessels. 6. 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. 7. Plasma is made up of what percent of water? A) 95%. B) 82%. C) 92%. D) 93%. Show Answer Correct Answer: C) 92%. 8. Which one does not form part of the structure of the heart? A) Pulmonary Artery. B) Vena Cava. C) Alveoli. D) Left Ventricle. Show Answer Correct Answer: C) Alveoli. 9. 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. 10. Which is a type of anemia A) Hemoglobin. B) Iron deficiency. C) Ascites. D) Edema. Show Answer Correct Answer: B) Iron deficiency. 11. An organ of the system A) Liver. B) Cell. C) Heart. D) None of above. Show Answer Correct Answer: C) Heart. 12. 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. 13. Makes up the 55% of blood A) Plasma. B) Blood cells. Show Answer Correct Answer: A) Plasma. 14. True or false:Arteries always carry blood away from the heart. A) True. B) False. Show Answer Correct Answer: A) True. 15. 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. 16. Which are the smallest blood vessels? A) Arteries. B) Capillaries. C) Veins. D) None of above. Show Answer Correct Answer: B) Capillaries. 17. Which function prevents blood from flowing back from the aorta back into the heart? A) Bicuspid valve. B) Tricuspid valve. C) Aortic Semilunar Valve. D) Pulmonary Semilunar Valve. Show Answer Correct Answer: C) Aortic Semilunar Valve. 18. 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-. 19. What is the MOST abundant component of blood? A) Erythrocytes. B) Plasma. C) Leukocytes. D) Thrombocytes. Show Answer Correct Answer: B) Plasma. 20. How many chambers a heart have? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: D) 4. ← 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