This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 427 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 427 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The organ system that provides the body with oxygen and rid the body of carbon dioxide. A) Circulatory System. B) Trachea. C) Arteries. D) Respiratory System. Show Answer Correct Answer: D) Respiratory System. 2. How many 02 molecules can a single hemoglobin molecule carry at one time? A) 1. B) 4. C) 50. D) Thousands. Show Answer Correct Answer: B) 4. 3. Which blood type would only have Rh and B antibodies flowing through blood plasma? A) A-. B) A+. C) B-. D) B+. Show Answer Correct Answer: A) A-. 4. Which of the following best described livor mortis? A) It is the cooling of the body after death. B) It is the warming of the body after death. C) It is the stiffening of the muscles after death. D) It is the pooling of blood after death. Show Answer Correct Answer: D) It is the pooling of blood after death. 5. These structures aid in spreading contraction signal to ventricles: A) IN Bundles. B) AV Bundles. C) Nodal groups. D) Heart Murphs. Show Answer Correct Answer: B) AV Bundles. 6. The blood releases ..... to the lungs. A) Oxygen. B) Carbon dioxide. C) Blood. D) Nutrients. Show Answer Correct Answer: B) Carbon dioxide. 7. The nob on the bottom part of the brain where balance and coordination are controlled is called the ..... A) Cerebellum. B) Cerebrum. C) Brain stem. D) None of above. Show Answer Correct Answer: A) Cerebellum. 8. Which of the following % is correct for the transportation of Carbon Dioxide as bicarbonate ions A) 22%. B) 8%. C) 70%. D) 97%. Show Answer Correct Answer: C) 70%. 9. The valve in the heart which guards the opening between the right auricle and the right ventricle is: A) Bicuspid valve. B) Tricuspid valve. C) Aortic semilunar valves. D) Pulmonary semilunar valves. Show Answer Correct Answer: B) Tricuspid valve. 10. Which vein brings the blood from the lower half of the body? A) Inferior vena cava. B) Cartitod artery. C) Superior vena cava. D) Aorta. Show Answer Correct Answer: A) Inferior vena cava. 11. The organs together form the ..... A) Skeletal system. B) Organ system. C) Circulatory system. D) None of above. Show Answer Correct Answer: B) Organ system. 12. What is the name of the artery that pumps blood from the heart to the rest of the body? A) Right ventricle. B) Aorta. C) Prevents back flow of blood. D) Transport oxygenated blood to the heart. Show Answer Correct Answer: B) Aorta. 13. How is carbon dioxide released from the body? A) When we exhale. B) When we urinate. C) When we sweat. D) When we inhale. Show Answer Correct Answer: A) When we exhale. 14. What is the name of the small flap of tissue that seals off the trachea during swallowing? A) Pharynx. B) Larynx. C) Alveoli. D) Epiglottis. Show Answer Correct Answer: D) Epiglottis. 15. A pacemaker adjusts the heart rate to correspond to the body's A) Creation of waste products. B) Need for carbon dioxide. C) Ability to fight disease. D) Need for oxygen. Show Answer Correct Answer: D) Need for oxygen. 16. What is the mixture of food and gastric juices in the stomach called? A) Bolus. B) Chyme. C) Hydrochloric acid. D) Enzymes. Show Answer Correct Answer: B) Chyme. 17. What is the major artery that carries oxygenated blood throughout the body? A) Aorta. B) Inferior vena cava. C) Coronary artery. D) Pulmonary artery. Show Answer Correct Answer: A) Aorta. 18. Which of the following BP readings can be classified as hypertension, stage 1? A) 116/78 mm Hg. B) 120/80 mm Hg. C) 130/88 mm Hg. D) 144/92 mm Hg. Show Answer Correct Answer: D) 144/92 mm Hg. 19. Cnidarians and flatworms use which mechanism to transport substances? A) Diffusion. B) A closed circulatory system. C) An open circulatory system. D) None of above. Show Answer Correct Answer: A) Diffusion. 20. The sac, or outside layer, that surrounds and protects the heart? A) Endocardium. B) Epicardium. C) Myocardium. D) Pericardium. Show Answer Correct Answer: D) Pericardium. ← 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