This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 92 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 92 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When people run long distances, their muscles require increased amounts of oxygen. Which system is responsible for carrying this oxygen to the muscles? A) Nervous. B) Respiratory. C) Digestive. D) Circulatory. Show Answer Correct Answer: D) Circulatory. 2. Xylem and Phloem are both ..... A) Transpiration. B) Absorption. C) Photosynthesis. D) Vascular tissue. Show Answer Correct Answer: D) Vascular tissue. 3. Which of these is NOT a blood vessel? A) Capillary. B) Vein. C) Artery. D) Alveoli. Show Answer Correct Answer: D) Alveoli. 4. How do we measure a person's heart rate? A) Beats per hour. B) Beats per minute. C) Beats per day. D) None of above. Show Answer Correct Answer: B) Beats per minute. 5. Deoxygenated blood enters the heart through A) The right ventricle. B) The right atrium. C) The left atrium. D) None of above. Show Answer Correct Answer: B) The right atrium. 6. The organ which is responsible for "pumping" blood to all of the regions of the body is known as what? A) Veins. B) Arteries. C) Heart. D) Aorta. Show Answer Correct Answer: C) Heart. 7. In which of the following phases of the cardiac cycle is a pulse generated? A) Atrial systole. B) Atrial diastole. C) Ventricular systole. D) Ventricular diastole. Show Answer Correct Answer: C) Ventricular systole. 8. Flexible tissue found at the ends of bones A) Cartilage. B) Muscle. C) Ligament. D) Tendon. Show Answer Correct Answer: A) Cartilage. 9. Fight any infection that might enter the body A) Plasma. B) Platelets. C) White blood cells. D) None of above. Show Answer Correct Answer: C) White blood cells. 10. In the walls of the heart, there are two thin layers around a thick layer of muscle called the A) Epithelial tissue. B) Pericardium. C) Connective tissue. D) Myocardium. Show Answer Correct Answer: D) Myocardium. 11. Counting the number of QRS complexes, which of the following can be interpreted? A) Rate of heartbeat. B) Rate of breathing. C) Cardiac output. D) Stroke volume. Show Answer Correct Answer: A) Rate of heartbeat. 12. This is the outer layer of pericardium that encloses the heart. A) Auricles. B) Left and right coronary arteries. C) Visceral Pericardium. D) Parietal Pericardium. Show Answer Correct Answer: D) Parietal Pericardium. 13. What is the function of the valves in veins? A) Facilitate gas exchange. B) Prevent backflow of blood. C) Carry blood to the heart. D) Connect capillaries. Show Answer Correct Answer: B) Prevent backflow of blood. 14. Platelets lack a nucleus and 'last' for 7-11 days. (T or F) A) True. B) False. Show Answer Correct Answer: A) True. 15. The heart is a large muscle in our body. A) True. B) False. Show Answer Correct Answer: A) True. 16. Which of the following results in increased cardiac output? A) Rapid heart rate. B) Loss of blood. C) Vasodilation. D) Dehydration. Show Answer Correct Answer: A) Rapid heart rate. 17. Large neck arteries on each side of the neck carry blood from heart to head A) Femoral. B) Carotid. C) Brachial. D) Coronary. Show Answer Correct Answer: B) Carotid. 18. Which statement correctly describes factors that affect blood flow? A) Narrow vessels increase pressure, lead to faster blood flow. B) Cell shape change increases resistance, leads to faster flow. C) Low pH decreases diffusion and leads to slow blood flow. D) High viscosity increases resistance, leads to slower flow. Show Answer Correct Answer: D) High viscosity increases resistance, leads to slower flow. 19. How does surface area affect the rate of diffusion? A) Greater the surface area the slower the rate. B) Greater the surface area the faster the rate. C) Smaller the surface area the faster the rate. D) Surface area does not affect diffusion. Show Answer Correct Answer: B) Greater the surface area the faster the rate. 20. Which blood is known as the universal donor? A) O-. B) O+. C) AB+. D) AB-. Show Answer Correct Answer: A) O-. ← 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