This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 399 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 399 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. These are the characteristics of tunica media of blood vessels, EXCEPT A) Consists of vascular smooth muscle fiber. B) If contraction happens, it causes vasodilation and vasoconstriction. C) All vessels has an identical tunica media. D) Is the middle layer of the vessel. Show Answer Correct Answer: C) All vessels has an identical tunica media. 2. What happens to blood at the lungs? A) It becomes oxygenated (gets oxygen) and gets rid of carbon dioxide. B) The blood gets both oxygen and carbon dioxide. C) The blood becomes deoxygenated (loses oxygen) and gets carbon dioxide. D) Both oxygen and carbon dioxide leave the blood. Show Answer Correct Answer: A) It becomes oxygenated (gets oxygen) and gets rid of carbon dioxide. 3. A heart attack is caused by A) Heart muscle not getting blood supply. B) The brain not telling the heart to beat. C) The valve in the heart not closing all the way. D) The top of the heart contracting before the bottom of the heart. Show Answer Correct Answer: A) Heart muscle not getting blood supply. 4. People with type O blood can get blood from people with which blood types? A) O only. B) A, B, AB, and O. C) A and O only. D) B and O only. Show Answer Correct Answer: A) O only. 5. What blood comes from the body via the veins into the right atrium? A) Red blood that is oxygen rich. B) Blue blood that is oxygen poor. C) Red blood that is oxygen rich. D) Pump the blood. Show Answer Correct Answer: B) Blue blood that is oxygen poor. 6. Protein that forms a complex with iron molecules and together they transport oxygen molecules throughout the body A) Iron. B) Oxygen. C) Hemoglobin. D) Erythrocytes. Show Answer Correct Answer: C) Hemoglobin. 7. ..... are the basic structure of everything alive. A) Chloroplasts. B) Cells. C) Capillaries. D) Plasma. Show Answer Correct Answer: B) Cells. 8. The liver and stomach are the organs in the circulatory system A) True. B) False. Show Answer Correct Answer: B) False. 9. What is the primary organ responsible for pumping blood throughout the body? A) Lungs. B) Liver. C) Heart. D) Kidneys. Show Answer Correct Answer: C) Heart. 10. Artery that carries blood from the heart to the lungs A) Capillary. B) Coronary. C) Pulmonary. D) Transfusion. Show Answer Correct Answer: C) Pulmonary. 11. What is the sequence of blood flow through the heart starting from the Vena Cava? A) Vena Cava $\rightarrow$ Right Atrium $\rightarrow$ Right Ventricle $\rightarrow$ Pulmonary Artery. B) Vena Cava $\rightarrow$ Left Atrium $\rightarrow$ Left Ventricle $\rightarrow$ Aorta. Show Answer Correct Answer: A) Vena Cava $\rightarrow$ Right Atrium $\rightarrow$ Right Ventricle $\rightarrow$ Pulmonary Artery. 12. What gas do we get through blood? A) Oxygen. B) Air. C) Carbon dioxide. D) Smoke. Show Answer Correct Answer: A) Oxygen. 13. What gas is expelled out of veins? A) Carbon dioxide. B) Oxygen. C) Helium. D) Hydrogen. Show Answer Correct Answer: A) Carbon dioxide. 14. TRUE or FALSEThe heart has two chambers. A) TRUE. B) FALSE . Show Answer Correct Answer: B) FALSE . 15. Superior vena cava-?-Tricuspid valve-right ventricle-Pulmonary valve-pulmonary artery-lungs-Pulmonary veins-left atrium-mitral valve-left ventricle-aorta-rest of body A) RIGHT ATRIUM. B) RIGHT VENTRICLE. C) LEFT ATRIUM. D) LEFT VENTRICLE. Show Answer Correct Answer: A) RIGHT ATRIUM. 16. This is the airway that has two pairs of vocal chords attached to it A) Lungs. B) Diaphragm. C) Pharynx. D) Larynx. Show Answer Correct Answer: D) Larynx. 17. The human body contains ..... of cells. A) Athousands. B) Bmillions. C) Cbillions. D) Dtrillions. Show Answer Correct Answer: D) Dtrillions. 18. How does the body absorbed digested food enter the circulatory system? A) Through the mouth. B) Through the stomach. C) Through the intestines. D) Through the blood vessels. Show Answer Correct Answer: D) Through the blood vessels. 19. What is the main function of red blood cells in the circulatory system? A) To fight infection. B) To transport nutrients. C) To regulate body temperature. D) To carry oxygen. Show Answer Correct Answer: D) To carry oxygen. 20. When your blood pressure is constantly high, you have a condition called hypertension. A) True. B) False. Show Answer Correct Answer: A) True. ← 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