This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 444 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 444 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the protein in plasma that helps fight disease? A) Hemoglobin. B) Red blood cells. C) Platelets. D) Antibodies. Show Answer Correct Answer: D) Antibodies. 2. The human circulatory system is a ..... system. A) Open. B) Closed. Show Answer Correct Answer: B) Closed. 3. What vocabulary word means a hollow, muscular organ that pumps blood throughout the body? A) Lung. B) Heart. C) Stomach. D) Brain. Show Answer Correct Answer: B) Heart. 4. Blood is MOSTLY ..... A) Plasma. B) Platelets. C) Red Blood Cells. D) Water. Show Answer Correct Answer: D) Water. 5. The blood vessels are tubes that connect the heart to the rest of the body ..... A) True. B) False. Show Answer Correct Answer: A) True. 6. A person with swollen gums rinses his mouth with warm salt water, and the swelling decreases. Which of the following has occurred? A) The swollen gums have absorbed the saltwater solution. B) The saltwater solution lowers the temperature of the water in the gums. C) The salt in the solution has moved against the concentration gradient. D) The water in the gums has moved out due to the high concentration of salt in the solution. Show Answer Correct Answer: D) The water in the gums has moved out due to the high concentration of salt in the solution. 7. What is the main function of the heart in the human body? A) To digest food. B) To pump blood. C) To filter toxins. D) To control body temperature. Show Answer Correct Answer: B) To pump blood. 8. What is the purpose of breathing? A) Remove carbon dioxide. B) Both options above are correct. C) Get energy for cells. D) None of the above. Show Answer Correct Answer: B) Both options above are correct. 9. Which system allows blood to circulate throughout the body to transport oxygen and nutrients to all the cells and tissues? A) Nervous. B) Respiratory. C) Circulatory. D) None of above. Show Answer Correct Answer: C) Circulatory. 10. Period of relaxation of the heart A) Diastole. B) Systole. C) Apex. D) Arrhythmias. Show Answer Correct Answer: A) Diastole. 11. Which of the following has these characteristics?-combat inflammation and allergic reactions-secrete heparin to slow down blood clotting A) Neutrophils. B) Lymphocytes. C) Basophils. D) Monocytes. Show Answer Correct Answer: C) Basophils. 12. In the figure, who is responsible for cycling oxygen into the atmosphere? A) Producers. B) Consumers. C) Decomposers. D) Fungi. Show Answer Correct Answer: A) Producers. 13. What is the main organ in the circulatory sysetm? A) Heart. B) Brain. C) Stomach. D) Kidney. Show Answer Correct Answer: A) Heart. 14. What molecule transports oxygen? A) Hemoglobin. B) Myoglobin. C) Bilirubin. D) Erythropoietin. Show Answer Correct Answer: A) Hemoglobin. 15. Controlling heart rate A) Auriculoventricular node. B) Butterfly valve. C) Three-way valve. D) Semilunar valve. Show Answer Correct Answer: A) Auriculoventricular node. 16. Which process are the xylem tubes part of? A) Translocation. B) Transpiration. Show Answer Correct Answer: B) Transpiration. 17. White blood cells move into and out of blood vessels by the process of (a) A) A diapedesis. B) Positive chemotaxis. C) Euglenoid movement. D) Plasmolysis. E) Diverticulitis. Show Answer Correct Answer: A) A diapedesis. 18. Trivia! Which of the following statements seems correct? (this question is ungraded, don't worry!) A) Larger Mammals = Fast Heart Rate. (think about newborns!). B) The Heart can beat around 3 to 5 mins outside the body. C) All blood comes in the same shade of red. D) No idea . Show Answer Correct Answer: B) The Heart can beat around 3 to 5 mins outside the body. 19. Blood in the left ventricle: A) Oxygenated. B) Deoxygenated. Show Answer Correct Answer: A) Oxygenated. 20. Anemia A) Inadequate number of red blood cells, hemoglobin, or both. B) Ballooning out (saclike formation) of an artery wall. C) Vessel becomes clogged with hardened material ( "hardening of the arteries" ). D) None of above. Show Answer Correct Answer: A) Inadequate number of red blood cells, hemoglobin, or both. ← 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