This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 396 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 396 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which statement is correct for most veins in the human body? A) They carry blood at high pressure. B) They have a pulse. C) They have valves. D) They take blood away from the heart. Show Answer Correct Answer: C) They have valves. 2. What percent of blood is made up of actual blood cells? A) 35%. B) 45%. C) 55%. D) 65%. Show Answer Correct Answer: B) 45%. 3. Which part of the blood helps fight infections? A) Red blood cells. B) White blood cells. C) Plasma. D) Platelets. Show Answer Correct Answer: B) White blood cells. 4. What is the main function of the nervous system? A) Clean waste water from the cells. B) Absorb nutrients for energy. C) Deliver messages to the brain. D) Pump blood throughout the body. Show Answer Correct Answer: C) Deliver messages to the brain. 5. What is the heart made out of? A) Muscles and fat. B) Our lungs. C) The body. D) Nothing. Show Answer Correct Answer: A) Muscles and fat. 6. Which of the following is a long extension that transmits nerve impulses to other cells? A) Dendrite. B) Axon. C) Cell body. D) None of the above. Show Answer Correct Answer: B) Axon. 7. The valve leading from the right atrium into the right ventricle is called? A) Mitral valve. B) Tricuspid valve. C) Aortic valve. D) Pulmonary valve. E) Bicuspid valve. Show Answer Correct Answer: B) Tricuspid valve. 8. Carries blood to the heart (may have multiple answers) A) Arteries. B) Veins. C) Capillaries. D) Alveoli. Show Answer Correct Answer: B) Veins. 9. Which part of your respiratory system warms and cleans the air? A) Alveoli. B) Larynx. C) Nasal Cavity. D) Trachea. Show Answer Correct Answer: C) Nasal Cavity. 10. The left upper chamber of the heart. A) Right Atrium. B) Left Atrium. C) Right Ventricles. D) Left Ventricles. Show Answer Correct Answer: B) Left Atrium. 11. The smallest blood vessels; connect the arteries and veins A) Capillaries. B) Arteries. C) Veins. D) Vena cava. Show Answer Correct Answer: A) Capillaries. 12. A Single Circulatory System is a simple loop in which blood flows: A) Heart $\rightarrow$; Gills $\rightarrow$ Body. B) Heart $\rightarrow$; Gills $\rightarrow$ Heart $\rightarrow$ Body. C) Heart $\rightarrow$; Gills $\rightarrow$ Body $\rightarrow$ Heart. D) Gills $\rightarrow$ Body $\rightarrow$ Heart. Show Answer Correct Answer: C) Heart $\rightarrow$; Gills $\rightarrow$ Body $\rightarrow$ Heart. 13. Human Circulatory System is divided in how many parts: A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: C) 3. 14. What is the phase of the cardiac cycle that takes less time? A) General diastole. B) Ventricular sistole. C) Auricular systole. D) None of above. Show Answer Correct Answer: C) Auricular systole. 15. Dissolved nutrients, wastes, and oxygen are exchanged between the blood and intercellular fluid through the walls of A) Arteries. B) Veins. C) Capillaries. D) Ventricles. Show Answer Correct Answer: C) Capillaries. 16. After blood leaves the right atrium, what valve prevents back flow? A) Tricuspid. B) Mitral. C) Pulmonary. D) Aortic. Show Answer Correct Answer: A) Tricuspid. 17. Top chamber on either side of the heart A) Atrium. B) Trachea. C) Valve. D) Ventricle. Show Answer Correct Answer: A) Atrium. 18. Your heart is a ..... that works very hard to pump blood filled with oxygen and nutrients to the cells in your body. A) Muscle. B) Machine. C) System. D) None of above. Show Answer Correct Answer: A) Muscle. 19. Someone who has Type O blood has what for antibodies (clumping proteins)? A) No antibodies. B) A antibodies. C) B antibodies. D) A and B antibodies. Show Answer Correct Answer: D) A and B antibodies. 20. Buildup of fatty material in arteries A) Atherosclerosis. B) Hypertension. C) Valves. D) Capillaries. Show Answer Correct Answer: A) Atherosclerosis. ← 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