This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 161 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 161 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Period of contraction of the heart A) Diastole. B) Systole. C) Pacemaker. D) Anemia. Show Answer Correct Answer: B) Systole. 2. The largest artery in the human body is the: A) Vena cava. B) Aorta. C) Atria. D) Carotid artery. Show Answer Correct Answer: B) Aorta. 3. What is the name of the top number of a blood pressure (ex:120/80mmHg) A) Systole. B) Diastole. C) Artery. D) Vein. Show Answer Correct Answer: A) Systole. 4. Which component of blood is responsible for transporting oxygen and carbon dioxide? A) Red Blood Cells. B) White Blood Cells. C) Platelets. D) Plasma. Show Answer Correct Answer: A) Red Blood Cells. 5. If you have the power to control the muscle it is called. A) Involuntary. B) Voluntary. Show Answer Correct Answer: B) Voluntary. 6. What is the function of platelets in the blood? A) Producing hormones. B) Fighting infections. C) Transporting oxygen. D) Helping blood clot. Show Answer Correct Answer: D) Helping blood clot. 7. Pulmonary artery carries which type of blood- A) Impure blood. B) Pure blood. C) All of the above. D) None of the above. Show Answer Correct Answer: A) Impure blood. 8. What component of the blood is solid? A) Platelets. B) Plasma. Show Answer Correct Answer: A) Platelets. 9. Aortic A) Pertaining to the artery. B) Record of a vein. C) Pertaining to the aorta. D) Valve. Show Answer Correct Answer: C) Pertaining to the aorta. 10. What does the QRS complex represent in the electrocardiogram? A) Interval between ventricle depolarization and ventricle repolarization. B) Ventricle depolarization. C) Delay between atrial depolarization and ventricle depolarization. D) Atrial depolarization. Show Answer Correct Answer: B) Ventricle depolarization. 11. Someone with Type AB blood has ..... A) Both A & B antibodies. B) No antibodies. C) Only A antigens. D) Only B antigens. Show Answer Correct Answer: B) No antibodies. 12. The heart is the size of A) Your thumb. B) Your fist. C) Your ribcage. D) Your foot. Show Answer Correct Answer: B) Your fist. 13. While studying about food chains in their science class, Mia, Ethan, and Isabella were asked, 'What happens when the population of predators in an ecosystem increases significantly?' A) The population of prey increases. B) The population of prey decreases. C) The population of other predators increases. D) The population of other predators decreases. Show Answer Correct Answer: B) The population of prey decreases. 14. Pulmonary arteries carry A) Impure blood. B) Oxygenated blood. C) Mixed blood. D) None. Show Answer Correct Answer: A) Impure blood. 15. These fatty substances stick to the artery walls. A) Sugars. B) Calcium. C) Cholesterol. D) Platelets. Show Answer Correct Answer: C) Cholesterol. 16. The blood tastes saltish due to the presence of dissolved A) Sodium chloride. B) Potassium chloride. C) Ammonium nitrate. D) Sodium nitrate. Show Answer Correct Answer: A) Sodium chloride. 17. Fixes a damaged or faulty heart valve and helps your heart to pump blood properly. Your surgeon cuts down the midline of your chest, through your breastbone, to reach your heart. The faulty heart valve will then be repaired or replaced. A) Heart valve surgery. B) Defibrillation. C) Artificial pacemaker surgery. D) None of above. Show Answer Correct Answer: A) Heart valve surgery. 18. What vessels carry the blood away from the heart? A) Arteries. B) Veins. C) The aorta. D) Capillaries. Show Answer Correct Answer: A) Arteries. 19. What is the pressure of blood against the walls of blood vessels? A) Blood pressure. B) Diastolic pressure. C) Systolic pressure. D) None of above. Show Answer Correct Answer: A) Blood pressure. 20. Recall what the liquid that the cells of blood are suspended in is called. A) Red blood cells. B) White blood cells. C) Plasma. D) Platelets. Show Answer Correct Answer: C) Plasma. ← 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