This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 231 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 231 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The doors which only open one way in the heart are called ..... A) Doors. B) Valves. C) Passageways. D) None of above. Show Answer Correct Answer: B) Valves. 2. Which substance in the blood helps coordinate activities in the body-such as responding to stress or controlling how all cells in the body take in or release sugar? A) Nutrients. B) Oxygen. C) Hormones. D) Metabolic wastes. Show Answer Correct Answer: C) Hormones. 3. Blood ..... waste from all parts of the body. A) Collects. B) Distributes. C) Stores. D) All of these. Show Answer Correct Answer: A) Collects. 4. Where are red blood cells made in our bodies? A) Cartlidge. B) Tendons. C) Capillaries. D) Bone Marrow. Show Answer Correct Answer: D) Bone Marrow. 5. The left side of the heart contains blood that is A) Rich in oxygen. B) Rich in carbon dioxide. C) Poor in oxygen. D) Poor in carbon dioxide. Show Answer Correct Answer: A) Rich in oxygen. 6. What happens during ventricular diastole? A) All semilunar valves open. B) The atrio-ventricular valves open. C) The pressure in the atria rises above the pressure in the ventricles. D) The pressure in the left atrium rises more than the pressure in the right atrium. Show Answer Correct Answer: C) The pressure in the atria rises above the pressure in the ventricles. 7. Lowest pressure against the blood vessels of the body. Measures between contractions A) Diastolic pressure. B) Systolic pressure. C) Hypotension. D) Hypertension. Show Answer Correct Answer: A) Diastolic pressure. 8. What is the main artery leaving the heart called? A) Aorta. B) Vena Cava. C) Capillary. D) Vein. Show Answer Correct Answer: A) Aorta. 9. Increase in wind speed will not increase the rate of stomatal transpiration in which of the following situations? A) All plants in night time. B) Plants whose stomata have closed. C) Plants with needle like leaves. D) Plants with sunken stomata. Show Answer Correct Answer: A) All plants in night time. 10. Which is/are characteristics of vein? A) Small lumen. B) Thick walls. C) Elastic walls. D) Have valves. Show Answer Correct Answer: D) Have valves. 11. ..... helps clot blood. A) Lymph nodes. B) Platelets. C) Red blood cells. D) White blood cells. Show Answer Correct Answer: B) Platelets. 12. Olivia and Charlotte are learning about the circulatory system. They want to know where the blood flows through to reach every body cell. Can you help them? A) Arteries. B) Veins. C) Capillaries. D) Lymphatic vessels. Show Answer Correct Answer: C) Capillaries. 13. Veins that empty blood from the lungs into the upper left heart chamber A) Inferior Vena Cava. B) Superior Vena Cava. C) Pulmonary Veins. D) Veins. Show Answer Correct Answer: C) Pulmonary Veins. 14. Which blood vessel has valves to prevent backflow of blood? A) Vein. B) Capillary. C) Artery. D) None of the above. Show Answer Correct Answer: A) Vein. 15. Which of the following "cause-and-effect" statements is true? A) Varicose veins cause an aneurysm. B) Arteriosclerosis causes hypertension. C) Leukemia causes phlebitis. D) An arrhythmia causes an aneurysm. Show Answer Correct Answer: B) Arteriosclerosis causes hypertension. 16. Which valve separates the left atrium and ventricle? A) Tricuspid valve. B) Bicuspid valve. C) Aortic valve. D) None of above. Show Answer Correct Answer: B) Bicuspid valve. 17. Saclike swelling in the wall of a vessel usually an artery A) Heart murmur. B) Aneurysm. C) TIA. D) CVA. Show Answer Correct Answer: B) Aneurysm. 18. Which side of the heart deals with deoxygenated blood? A) Right. B) Left. Show Answer Correct Answer: A) Right. 19. Thrombo A) Red. B) Vessel. C) Clot. D) White. Show Answer Correct Answer: C) Clot. 20. Detects change and sends a message to the control center A) Receptor. B) Control center. C) Effector. D) Regulation. Show Answer Correct Answer: A) Receptor. ← 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