This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 625 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 625 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Food broken down by chemicals is called A) Mechanical digestion. B) Chemical digestion. Show Answer Correct Answer: B) Chemical digestion. 2. What does the T wave represent in the electrocardiogram? A) Atrial contraction. B) Ventricle contraction. C) Ventricle relaxation. D) Atrial relaxation. Show Answer Correct Answer: C) Ventricle relaxation. 3. Your heart is about the same size as which other part of your body? A) Foot. B) Fist. C) Head. D) Toe. Show Answer Correct Answer: B) Fist. 4. If oxygen-rich blood is completely cut off by total blockage in an artery, then I will experience A) A heart attack. B) Good health. C) A headache. D) Restless leg syndrome. Show Answer Correct Answer: A) A heart attack. 5. What is the name of the strongest part of the heart? A) Right ventricle. B) Left ventricle. C) Right atrium. D) Left atrium. Show Answer Correct Answer: B) Left ventricle. 6. A type of beetle was eating sugar cane crops in Australia and caused HARM. Which of the following best defines an organism that causes harm? A) Carnivore. B) Invasive species. C) Prey. D) Decoposer. Show Answer Correct Answer: B) Invasive species. 7. The AV node generates electrical impulses which cause the atria to contraction. A) True. B) False. Show Answer Correct Answer: B) False. 8. Your arteries supply blood A) With oxygen. B) Without oxygen. Show Answer Correct Answer: A) With oxygen. 9. What do heart valves do? A) Regulates the speed of blood flow. B) Separate red blood from black blood. C) Controls the contraction and relaxation of the heart muscle. D) Controls the direction of blood flow. Show Answer Correct Answer: D) Controls the direction of blood flow. 10. What are the structural characteristics of capillaries? A) Narrow lumen, thick wall, no valves. B) Wide lumen, thin wall, have valves. C) Very thin walled, permeable. D) None of the above. Show Answer Correct Answer: C) Very thin walled, permeable. 11. Connective tissue that attaches muscle to bone A) Joint. B) Cartilage. C) Muscle. D) Tendon. Show Answer Correct Answer: D) Tendon. 12. The oxygenated blood leaves the lungs and goes to the A) Body. B) Heart. C) Left atria. D) Right atria. Show Answer Correct Answer: C) Left atria. 13. The primary organs of the respiratory system are the A) Lungs. B) Heart. C) Trachea. D) Bronchioles. Show Answer Correct Answer: A) Lungs. 14. The skeleton is composed of ..... bones that provide shape to the body. A) 205. B) 206. C) 207. D) 208. Show Answer Correct Answer: B) 206. 15. The heart is the size of an adult foot? A) True. B) False. Show Answer Correct Answer: B) False. 16. What is the name of the air we breath in? A) Oxygen. B) Carbon Dioxide. C) Inhale. D) Exhale. Show Answer Correct Answer: A) Oxygen. 17. Produces antibodies to aid in the immune response A) Lymphocyte. B) Eosinophil. C) Monocyte. D) Thrombocyte (platelets). E) Thrombocyte (platelets). Show Answer Correct Answer: A) Lymphocyte. 18. How much time does it take for one Cardiac Cycle? A) 0.09 seconds. B) 0.8 seconds. C) 0.06 seconds. D) None of these. Show Answer Correct Answer: B) 0.8 seconds. 19. What is another word for AV bundle? A) Bundle of HIS. B) AV node. C) Pacemaker. D) Purkinje Fibers. Show Answer Correct Answer: A) Bundle of HIS. 20. The aorta is an artery. This means that it carries blood ..... A) To the heart. B) Away from the heart. C) Past the heart. D) None of above. Show Answer Correct Answer: B) Away from the heart. ← 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