This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 471 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 471 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. ..... prevent the backward flow of blood. A) Viscosity. B) Valves. C) Ventricles. D) Veins. Show Answer Correct Answer: B) Valves. 2. Lime water can be used to detect the presence of oxygen A) True. B) False. Show Answer Correct Answer: B) False. 3. The inferior vena cava brings the ..... blood to the ..... A) Oxygenated, left atrium. B) Deoxygenated blood, left ventricle. C) Deoxygenated blood, right atrium. D) Oxygenated blood, right ventricle. Show Answer Correct Answer: C) Deoxygenated blood, right atrium. 4. The lymp is formed of interstitial fluid and blood plasma. A) True. B) False. Show Answer Correct Answer: A) True. 5. When these contract, the a-v (atrio-ventricular) valves close: A) Atria. B) Ventricles. C) Pulmonary arteries. D) Aorta. Show Answer Correct Answer: B) Ventricles. 6. Which chamber of the heart has the thinnest myocardial wall? A) Left ventricle. B) Right ventricle. C) Left atrium. D) Right atrium. Show Answer Correct Answer: D) Right atrium. 7. The red fluid that circulates in the heart, arteries, veins and capillaries of humans and animals. Picks up oxygen in the lungs and carries it all over the body. A) Blood. B) Oxygen. C) Carbon Dioxide. D) Circulation. Show Answer Correct Answer: A) Blood. 8. We breathe in carbon dioxide and breathe out oxygen A) True. B) False. Show Answer Correct Answer: B) False. 9. Food broken down by physical processes is called A) Mechanical digestion. B) Chemical digestion. Show Answer Correct Answer: A) Mechanical digestion. 10. Where oxygen is brought into the body and Carbon Dioxide is removed from the body A) Lungs. B) Trachea. C) Bronchi. D) Pharynx. E) Alveoli. Show Answer Correct Answer: A) Lungs. 11. What artery is attached to the heart? A) The AORTA. B) The FEMORAL. C) The RADIAL . D) None of above. Show Answer Correct Answer: A) The AORTA. 12. Plasma consist of how much percent of the water? A) 50%. B) 90%. C) 10%. D) 30%. Show Answer Correct Answer: B) 90%. 13. What makes up around 55% of the blood? A) Plasma. B) Red Blood Cells. C) White Blood Cells. D) Platelets. Show Answer Correct Answer: A) Plasma. 14. A-25-years old medical student came to you with Blood Report that shows Hb 7% MCV 70. The probably cause of this aneamia is; A) Aplastic anemia. B) Iron deficiency. C) Thalassemia. D) Anemia of chronic disease. Show Answer Correct Answer: B) Iron deficiency. 15. Why does deoxygenated blood go to the lungs? A) To collect oxygen. B) To deliver oxygen. C) To pick up carbon dioxide. D) None of above. Show Answer Correct Answer: A) To collect oxygen. 16. Which type of respiration is being described if glucose is oxidized by the presence of oxygen and formed ATP? A) Cellular respiration. B) External respiration. C) Internal respiration. D) Breathing. Show Answer Correct Answer: A) Cellular respiration. 17. Valve between the left ventricle and the aorta. A) Aortic valve. B) Pulmonary valve. C) Tricuspid valve. D) Mitral valve. Show Answer Correct Answer: A) Aortic valve. 18. Flaps that allow blood to flow in only one direction through the heart. A) Valves. B) Skin. C) Pumps. D) Veins. Show Answer Correct Answer: A) Valves. 19. Pacemaker- A) Abnormal heart rhythm. B) Device that shocks the heart with electrical current to regain normal rhythm. C) Small, battery-powered device with electrodes to correct abnormal heart rhythm. D) None of above. Show Answer Correct Answer: C) Small, battery-powered device with electrodes to correct abnormal heart rhythm. 20. Birds have ..... ventricle (s) A) One. B) Two. C) Three. D) Four. Show Answer Correct Answer: B) Two. ← 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