This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 412 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 412 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How many ventricles are there? A) 1. B) 2. C) 10. D) 0. Show Answer Correct Answer: B) 2. 2. What makes up 55% of the blood? A) Red blood cells. B) White blood cells. C) Plasma. D) Platelets. Show Answer Correct Answer: C) Plasma. 3. A system of organs that includes the heart, blood vessels, and blood which is circulated throughout the entire body of a human or other vertebrate A) Red Blood Cells. B) Veins. C) Circulatory System. D) White Blood Cellls. Show Answer Correct Answer: C) Circulatory System. 4. In ABO system of blood groups, O blood group A) Lacks antigens. B) Lacks antibodies. C) Lacks antigens but has antibodies a and b. D) Lacks antibodies but has antigens A and B. Show Answer Correct Answer: C) Lacks antigens but has antibodies a and b. 5. This blood cell contains hemoglobin which helps carry oxygen. These blood cells are replaced every few months. A) Red blood cells. B) White Blood Cells. C) Platelets. D) Leukocytes. Show Answer Correct Answer: A) Red blood cells. 6. Why is it important to keep your digestive system healthy? A) Because it helps you breathe. B) Because it helps your body absorb nutrients. C) Because it helps your blood circulate properly throughout the body. D) None of above. Show Answer Correct Answer: B) Because it helps your body absorb nutrients. 7. When you hear the first heat sound "lub" what is happening in the heart? A) The atrioventricular valves (AV) close. B) The atrioventricular valves (AV) open. C) The semilunar valves (SL) close. D) The semilunar valves (SL) open. Show Answer Correct Answer: A) The atrioventricular valves (AV) close. 8. What pass through capillary walls to enter body tissue and what its main function? A) Thrombocytes and protect cells. B) Leukocytes and fight infection. C) Erythrocytes and transport nutrients. D) None of above. Show Answer Correct Answer: B) Leukocytes and fight infection. 9. Which of the following organisms have single circulation? A) Fishes. B) Mammals. C) Birds. D) Reptiles. Show Answer Correct Answer: A) Fishes. 10. How thick is a capilary? A) 5 cells thick. B) 5 cm thick. C) 1 cell thick. D) 1 cm thick. Show Answer Correct Answer: C) 1 cell thick. 11. Which statement is true about arteries? A) Arteries carry oxygen-poor blood. B) Arteries move blood toward the heart. C) Arteries connect to the atria of the heart. D) Arteries move blood away from the heart. Show Answer Correct Answer: D) Arteries move blood away from the heart. 12. Which vessel is responsible for returning oxygen rich blood to the heart from the lungs? A) Pulmonary vein. B) Pulmonary artery. C) Vena cava. D) Aorta. Show Answer Correct Answer: A) Pulmonary vein. 13. Michelle's grandmother became dizzy and fainted. Her doctor reports that she had a temporary loss of blood flow to her brain. Michelle expects her grandmother will be treated for: A) Hypertension. B) A transient ischemic attack. C) Varicose veins. D) A myocardial infarction. Show Answer Correct Answer: B) A transient ischemic attack. 14. What inheritance patterns makes the blood type AB possible? A) Incomplete dominance. B) Multiple alleles. C) Codominance. D) Total dominance. Show Answer Correct Answer: C) Codominance. 15. Blood carries ..... and ..... to the lungs, kidneys, and digestive system to be removed from the body. A) Oxygen; carbon dioxide. B) Oxygen; nutrients. C) Carbon dioxide; waste materials. D) Carbon dioxide; nutrients. Show Answer Correct Answer: C) Carbon dioxide; waste materials. 16. Your systole blood pressure is the pressure in your artery while: A) THE HEART IS AT REST. B) THE HEART IS CONTRACTING. C) THE HEART IS AT REST AND CONTRACTING. D) THE ARTERIES ARE AT REST. Show Answer Correct Answer: B) THE HEART IS CONTRACTING. 17. Blood travelling from the small intestine to the heart has ..... A) More digested food, less oxygen. B) Less digested food, more oxygen. Show Answer Correct Answer: A) More digested food, less oxygen. 18. The aorta is the largest artery. This means that it carries the blood ..... from the heart and to the rest of the body. A) To. B) Away. C) Toward. D) None of above. Show Answer Correct Answer: B) Away. 19. These vessels carry deoxygenated blood back to the veins. A) Arterioles. B) Capillaries. C) Venules. D) None of above. Show Answer Correct Answer: C) Venules. 20. Energy produced through respiration when oxygen is NOT used is called ..... respiration. A) Aerobic. B) Anaerobic. Show Answer Correct Answer: B) Anaerobic. ← 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