This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Biology Chapter 18 Body Fluids And Circulation – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 13 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Assertion (A)-Human heart is called myogenic.Reason (R)-Normal activities of the heart are regulated extrinsically, regulated by specialised muscles A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true and R is not the correct explanation of A. C) A is true, but R is false. D) Both A and R are false. Show Answer Correct Answer: C) A is true, but R is false. 2. Veins carry oxygenated blood in the human body. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 3. Blood pressure in the pulmonary artery is: A) Same as that in aorta. B) More then that in carotid artery. C) More then that in pulmonary vein. D) Less then that in the vena cava. Show Answer Correct Answer: C) More then that in pulmonary vein. 4. Ldentify the correct statement regarding cardiac activity. A) T wave represent Ventricle contraction. B) Parasympathetic neural signals increase the rate of heartbeat. C) Adrenal medullary hormones can increase cardiac output. D) The end of a T-wave marks the end of diastole. Show Answer Correct Answer: C) Adrenal medullary hormones can increase cardiac output. 5. What produces systolic blood pressure? A) Contraction of the right atrium. B) Contraction of the right ventricle. C) Contraction of the left atrium. D) Contraction of the left ventricle. Show Answer Correct Answer: D) Contraction of the left ventricle. 6. Blood circulation that starts in capillaries and end in capillaries is called: A) Portal circulation. B) Hepatic circulation. C) Lymphatic circulation. D) Renal circulation. Show Answer Correct Answer: A) Portal circulation. 7. Arteries have valves to prevent the backflow of blood. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 8. Which of the following is not a component of the blood vascular system? A) Heart. B) Blood. C) Lungs. D) Blood vessel. Show Answer Correct Answer: C) Lungs. 9. What is the main function of the sinoatrial node? A) Generates action potentials. B) Pumps blood. C) Filters blood. D) Regulates blood pressure. Show Answer Correct Answer: A) Generates action potentials. 10. Sino atrial node generates how many action potential per hour A) 70-75. B) 60-65. C) 65-70. D) 4200-4500. Show Answer Correct Answer: D) 4200-4500. 11. -Assertion:Trachea not collapsed even when there is no air in it.Reason:Trachea is supported by the cartilaginous ring. A) Both Assertion and Reason are true and Reason is the correct explanation of Assertion. B) Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. C) Assertion is true but Reason is false. D) Both Assertion and Reason are false. Show Answer Correct Answer: A) Both Assertion and Reason are true and Reason is the correct explanation of Assertion. 12. What is the significance of the hepatic portal system? A) Connects heart to lungs. B) Carries oxygenated blood. C) Regulates blood pressure. D) Transports blood from intestines to liver. Show Answer Correct Answer: D) Transports blood from intestines to liver. 13. Which component of blood is responsible for oxygen transport? A) Red blood cells. B) White blood cells. C) Platelets. D) Plasma. Show Answer Correct Answer: A) Red blood cells. 14. A cardiac pacemaker fails to function normally in a patient. A pacemaker is to be grafted into him by the doctors. The graft will likely be placed at the site of? A) Atrioventricular bundle. B) Purkinje system. C) Sinuatrial node. D) Atrioventricular node. Show Answer Correct Answer: C) Sinuatrial node. 15. ASSERTION (A):During joint diastole, no blood flows from atria to ventricleREASON (R):Cuspid valves are closed during joint diastole A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true and R is not the correct explanation of A. C) A is true R is false. D) Both A and R are false. Show Answer Correct Answer: D) Both A and R are false. 16. Which blood vessels carry oxygenated blood from the lungs to the heart? A) Pulmonary vein. B) Pulmonary artery. C) Aorta. D) Vena cava. Show Answer Correct Answer: A) Pulmonary vein. 17. What happens during the systole phase of the cardiac cycle? A) Blood fills the chambers. B) Blood is pumped out. C) Heart relaxes. D) Valves close. Show Answer Correct Answer: B) Blood is pumped out. 18. Which enzyme is responsible for the conversion of inactive fibrinogens into fibrins: A) Renin. B) Epinephrine. C) Thrombokinase. D) Thrombin. Show Answer Correct Answer: D) Thrombin. 19. Which one have open circulatory system:1. ascidia 2. cockroach 3. earthworm 4. prawn 5. leech 6. snail 7. squid A) 2, 4, 6. B) 1, 2, 4, 6. C) 3, 4, 5, 7. D) 1, 2, 4, 5, 6. Show Answer Correct Answer: A) 2, 4, 6. 20. Prothrombin required for blood clotting is produced in A) Stomach. B) Liver. C) Spleen. D) Pancreas. Show Answer Correct Answer: B) Liver. 21. 2 major types of lymphocytes and function: A) A&BOxygen transport. B) B&TImmune response. C) X&YBlood clotting. D) Alpha & betaDigestion. Show Answer Correct Answer: B) B&TImmune response. 22. What is the main function of the pulmonary circuit? A) Pumping blood to the body. B) Oxygenating blood. C) Filtering blood. D) Distributing nutrient. Show Answer Correct Answer: B) Oxygenating blood. 23. Which ion plays a very important role in clotting reactions? A) Calcium ions Ca2+. B) Sodium ions Na+. C) Magnesium ions Mg2+. D) Potassium ions K+. Show Answer Correct Answer: A) Calcium ions Ca2+. 24. Which of the following is not a component of the lymphatic system? A) Lymph nodes. B) Lymph vessels. C) Spleen. D) Pancreas. Show Answer Correct Answer: D) Pancreas. 25. The rate of heartbeat is regulated by the integrated activity of inhibiting and accelerated effects occurring in which part of the brain? A) Cerebellum. B) Diencephalon. C) Medulla oblongata. D) Pons varolii. Show Answer Correct Answer: C) Medulla oblongata. ← PreviousNext →Related QuizzesClass 11 Biology Chapter 18 Body Fluids And Circulation Quiz 1Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 2Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 3Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 4Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 5Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 6Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 7Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 8Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 9Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books