This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 393 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 393 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Superior and inferior vena cava are the largest of these: A) Arteries. B) Veins. C) Capillaries. D) None of above. Show Answer Correct Answer: B) Veins. 2. What is the names of the chambers of the heart? A) Upper chamber, lower chamber, middle chamber, side chamber. B) Left atrium, right atrium, left ventricle, and right ventricle. C) Front chamber, back chamber, top chamber, bottom chamber. D) Inlet chamber, outlet chamber, central chamber, peripheral chamber. Show Answer Correct Answer: B) Left atrium, right atrium, left ventricle, and right ventricle. 3. Which one carries blood to your lungs for oxygen? A) Veins. B) Arteries. C) Nerves. D) None of above. Show Answer Correct Answer: A) Veins. 4. The heart valves do all of the following, EXCEPT: A) Separate the atria and the ventricles. B) Keep the blood flowing forward. C) Regulate the heart's contractions. D) Include the mitral valve and bicuspid valve. Show Answer Correct Answer: C) Regulate the heart's contractions. 5. Gas exchange occurs in the A) Alveoli. B) Bronchi. C) Bronchioles. D) Trachea. Show Answer Correct Answer: A) Alveoli. 6. Whenever the word "pulmonary" is used, it is in reference to which organs in our body? A) Heart. B) Phalanges. C) Brain. D) Lungs. Show Answer Correct Answer: D) Lungs. 7. What components of the circulatory system fight infection in the body? A) Plasma. B) Platelets. C) Red blood cells. D) White blood cells. Show Answer Correct Answer: D) White blood cells. 8. The smaller, upper chambers of the heart are the ..... A) Ventricles. B) Atria. C) Bicuspid. D) Semilunar. Show Answer Correct Answer: B) Atria. 9. The liquid portion of the blood. A) Red blood cells. B) White blood cells. C) Plasma. D) Platelets. Show Answer Correct Answer: C) Plasma. 10. You breathe in ..... and breathe out ..... A) Carbon dioxide, oxygen. B) Oxygen, carbon dioxide. Show Answer Correct Answer: B) Oxygen, carbon dioxide. 11. What is facilitated diffusion? A) Transport that uses proteins to help move molecules across the membrane. B) Movements of substances through a membrane. C) When molecules spread from High to Low concentration on their own. D) When pressure pushes something through a membrane. Show Answer Correct Answer: A) Transport that uses proteins to help move molecules across the membrane. 12. When a person get a cut in the skin and starts bleeding, the ..... help to stop the bleeding. This is called ..... A) Platelets, blood courting. B) Platelets, blood clotting. C) Plasma, blood clotting. D) Plasma, blood coagulation. Show Answer Correct Answer: B) Platelets, blood clotting. 13. The muscular wall that the divides the two sides of the heart is the ..... A) Diaphragm. B) Pericardium. C) Pulmonary valve. D) Septum. Show Answer Correct Answer: D) Septum. 14. What is the function of the right atrium in the circulatory system? A) Receives oxygenated blood from the lungs. B) Receives deoxygenated blood from the body. C) Pumps oxygenated blood to the body. D) Pumps deoxygenated blood to the lungs. Show Answer Correct Answer: B) Receives deoxygenated blood from the body. 15. It is the system of tubes, or vascular system, through which blood flows. A) Vascular System. B) Vacillation. C) Vascular Tubules. D) Vascular Blood. Show Answer Correct Answer: A) Vascular System. 16. Which of the following is the function of the auricles / atria? A) They pump oxygen-rich blood to all parts of the body. B) They are responsible for receiving used blood coming from the lung and from all parts of the body. C) They purify blood to be distributed to all parts of the body. D) They carry oxygen-poor blood to the lungs. Show Answer Correct Answer: B) They are responsible for receiving used blood coming from the lung and from all parts of the body. 17. What are the three kinds of blood vessels? A) Arteries, Capillaries, Veins. B) Aorta, Valves, Ventricle. C) Atrium, Pacemaker, Epithelial cells. D) None of above. Show Answer Correct Answer: A) Arteries, Capillaries, Veins. 18. Capillaries are the smallest blood vessels in the mammalian body. Capillary walls are very thin, leaky and have pores approximately 100nm in length. Explain how these structural features of capillaries contribute to their function. A) They allow many capillaries to be together in a small space. B) They allow the capillaries to be very elastic. C) They allow for the diffusion of gas molecules. D) None of above. Show Answer Correct Answer: C) They allow for the diffusion of gas molecules. 19. How many red blood cells are there in a pinhead sized drop of blood? A) 5 million. B) 10 million. C) 1 million. D) 500 thousand. Show Answer Correct Answer: A) 5 million. 20. In which region will the highest pressure develop during the beating of the heart? A) Left atrium. B) Left ventricle. C) Pulmonary artery. D) Right ventricle . Show Answer Correct Answer: B) Left ventricle. ← 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