This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Biology > Class 11 Biology Chapter 18 Body Fluids And Circulation – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the primary function of globulins in plasma? A) Defense mechanisms. B) Transport nutrients. C) Regulate blood pressure. D) Aid in blood clotting. Show Answer Correct Answer: A) Defense mechanisms. 2. Q3) Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature?(a) They do not need to reproduce(b) They are somatic cells(c) They do not metabolize(d) All their internal space is available for oxygen transport A) Only (d). B) Only (a). C) (a), (c) and (d). D) (b) and (c). Show Answer Correct Answer: A) Only (d). 3. Assertion (A)-Wall of the ventricles are much thicker than that of atrium.Reason (R)-They have to pump blood to various organs and the pressure flowing in them is more than that of atrium. A) Both A and R are true and R is correct explanation of A. B) Both A and R are true and R is not correct explanation of A. C) A is true R is false. D) A is false R is true. Show Answer Correct Answer: A) Both A and R are true and R is correct explanation of A. 4. What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL? A) 50 beats per minute. B) 125 beats per minute. C) 75 beats per minute. D) 100 beats per minute. Show Answer Correct Answer: D) 100 beats per minute. 5. What is the role of calcium ions in blood coagulation? A) Promote oxygen transport. B) Activate clotting factors. C) Regulate heart rate. D) Enhance nutrient absorption. Show Answer Correct Answer: B) Activate clotting factors. 6. S 1-Blood is a specialised connective tissueS 2-It consist of solid matrix. A) S 1 and S 2 both are true. B) S 1 and S 2 both are false. C) S 1 is true but S 2 is false. D) S 1 is false but S 2 is true. Show Answer Correct Answer: C) S 1 is true but S 2 is false. 7. Fill in the blanks-Incomplete Double circulation ..... (1) ..... Single circulation ..... (2) ..... Complete Double circulation ..... (3) ..... A) Reptiles(2) Fishes(3) Mammals. B) Mammals(2) Fishes(3) Birds. C) Reptiles(2) Amphibians(3) Birds. D) Fishes(2) Amphibians(3) Birds. Show Answer Correct Answer: A) Reptiles(2) Fishes(3) Mammals. 8. What is erythroblastosis foetalis? A) A blood clotting disorder. B) A condition caused by Rh incompatibility. C) A type of heart disease. D) A respiratory condition. Show Answer Correct Answer: B) A condition caused by Rh incompatibility. 9. Which layer of the wall of the blood vessels is made up of circular smooth muscle? A) Outer. B) Middle. C) Inner. D) Both a and b. Show Answer Correct Answer: B) Middle. 10. Arteries are best defined as the vessels which A) Carry blood from one visceral organ to another visceral organ. B) Break up into capillaries which reunite to form a vein. C) Supply oxygenated blood to the different organs. D) Carry blood away from the heart to different organs. Show Answer Correct Answer: D) Carry blood away from the heart to different organs. 11. Asthma disease is related with A) Inflammation of bronchi and bronchioles. B) Inflammation of Alveoli. C) Inflammation of Diaphragm. D) Inflammation of Thoracic chamber. Show Answer Correct Answer: A) Inflammation of bronchi and bronchioles. 12. ECG depicts the depolarisation and repolarisation processes during the cardiac cycle. In the ECG of a normal healthy individual one of the following waves is not represented. A) Depolarisation of atria. B) Repolarisation of atria. C) Depolarisation of ventricles. D) Repolarisation of ventricles. Show Answer Correct Answer: B) Repolarisation of atria. 13. Person with blood group AB is considered a universal recipient because he has A) Both A and B antigens in the plasma but no antibodies. B) Both A and B antibodies in the plasma. C) Both A and B antigens on RBC but no antibodies in the plasma. D) No antigen on RBC and no antibody in the plasma. Show Answer Correct Answer: C) Both A and B antigens on RBC but no antibodies in the plasma. 14. During acute myocardial infarction, which of the following changes occurs in the ECG? A) Elevated S-T segment. B) Flattened T wave. C) Increased length of PQ interval. D) Depressed S-T segment. Show Answer Correct Answer: A) Elevated S-T segment. 15. What is the approximate volume of blood in an average adult human? A) 2 litres. B) 5 litres. C) 10 litres. D) 8 litres. Show Answer Correct Answer: B) 5 litres. 16. Erythroblastosis foetalis occurs when ..... from mother passes to child through the placenta? A) Calcium ion. B) ABO antibodies. C) Anti-Rh antibodies. D) Rh antigen. Show Answer Correct Answer: C) Anti-Rh antibodies. 17. The duration of cardiac cycle in a normal man is- A) 0.8 seconds. B) 72 seconds. C) 80 seconds. D) 60 seconds. Show Answer Correct Answer: A) 0.8 seconds. 18. The exchange of the gases at the surface of alveoli takes place through A) Osmosis. B) Active transport. C) Simple diffusion. D) All of these. Show Answer Correct Answer: C) Simple diffusion. 19. Which part of the heart is known as the pacemaker? A) Sinoatrial node. B) Purkinje fibers. C) Atrioventricular node. D) Bundle of His. Show Answer Correct Answer: A) Sinoatrial node. 20. Read the following statements and select the correct option.Statement 1:The SA node acts as pacemaker.Statement 2:The SA node is located in the wall of the right atrium near the interatrial septum. A) Both statement 1 and 2 are correct. B) Statement 1 is correct but statement 2 is incorrect. C) Statement 1 is incorrect but statement 2 is correct. D) Both statements 1 and 2 are incorrect. Show Answer Correct Answer: B) Statement 1 is correct but statement 2 is incorrect. 21. Mitral valve in mammals guide the opening between: A) RA&LV. B) LA&LV. C) RA&RV. D) LA&RV. Show Answer Correct Answer: B) LA&LV. 22. Doctors use stethoscope to hear the sound; produced during each cardiac cycle. The second sound is heard when A) AV node receives signal from SA node. B) AV valves open up. C) Ventricular walls vibrate due to gushing of blood from atria. D) Semilunar valves close down after the blood flows into vessels from ventricles. Show Answer Correct Answer: D) Semilunar valves close down after the blood flows into vessels from ventricles. 23. If due to some injury the chordae tendineae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect? A) The flow of blood into the aorta will be slowed down. B) The blood will tend to flow back into the left atrium. C) The 'pacemaker' will stop working. D) The flow of blood into the pulmonary artery will be reduced. Show Answer Correct Answer: D) The flow of blood into the pulmonary artery will be reduced. 24. What does the QRS complex in an ECG represent? A) Electrical activity of the atria. B) Resting state of the heart. C) Atrial contraction. D) Ventricular contraction. Show Answer Correct Answer: D) Ventricular contraction. 25. Assertion. In arthropods, especially in insects, respiration is very efficient. Reason. Insects have a special tracheal system. In this air is carried directly to the cells by tracheoles. 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. 26. In the heart, the right atrium receives blood from which part of the body? A) Pulmonary circulation. B) Systemic circulation. C) Coronary circulation. D) Hepatic circulation. Show Answer Correct Answer: D) Hepatic circulation. 27. Assertion:Prothrombin enzyme act as antiheparin. Reason:Heparin prevent coagulation of blood in blood vessels. A) Both assertion and reason are true and reason is correct explanation of assertion. B) Both assertion and reason are true but reason is not correct explanation of assertion. C) Assertion is true but reason is false. D) Assertion is false but reason is true. Show Answer Correct Answer: B) Both assertion and reason are true but reason is not correct explanation of assertion. 28. Human heart is ..... in origin A) Ectoderm. B) Mesoderm. C) Cardioderm. D) Endoderm. Show Answer Correct Answer: B) Mesoderm. 29. What type of circulatory system do vertebrates possess? A) Open circulatory system. B) Dual circulatory system. C) Lymphatic system. D) Closed circulatory system. Show Answer Correct Answer: D) Closed circulatory system. 30. Which of the following statements is wrong about the closed circulatory system? A) Blood remains within blood vessels and never comes in direct contact with the body cells. B) In it, the flow of fluid can be more precisely regulated. C) There is no blood capillary. D) Blood flow is more rapid due to higher pressure. Show Answer Correct Answer: C) There is no blood capillary. 31. An Rh-ve person, who has not exposed to Rh+ve blood- A) Will form specific antibodies against the Rh antigens. B) Will not form specific antibodies against the Rh antigens. C) Based on environment conditions. D) None of the above. Show Answer Correct Answer: B) Will not form specific antibodies against the Rh antigens. 32. Excessively high heart rate (>180) can reduce cardiac output because A) Blood is moving too fast through the lungs to pick up enough oxygen. B) It tries out the heart muscles and so they pump slower. C) It reduces the time for ventricular filling which reduces stroke volume. D) The PR-interval increases which leads to longer ventricular diastole and shorter ventricular systole. Show Answer Correct Answer: C) It reduces the time for ventricular filling which reduces stroke volume. 33. How do parasympathetic neural signals affect the working of the heart? ..... A) Both heart rate and cardiac output increase. B) Heart rate decreases but cardiac output increases. C) Reduce both heart rate and cardiac output. D) Heart rate is increased without affecting the cardiac output. Show Answer Correct Answer: C) Reduce both heart rate and cardiac output. 34. Assertion:Fibrins are produced by the conversion of fibrinogen in the presence of enzyme, thrombin. Reason:Plasma without fibrinogen and blood corpuscles is serum. A) Both assertion and reason are true and reason is correct explanation of assertion. B) Both assertion and reason are true but reason is not correct explanation of assertion. C) Assertion is true but reason is false. D) Assertion is false but reason is true. Show Answer Correct Answer: C) Assertion is true but reason is false. 35. "P" wave in ECG occurs before: A) End of arterial contraction. B) Beginning of atrial contraction. C) Onset of ventricular contraction. D) None of the above. Show Answer Correct Answer: C) Onset of ventricular contraction. 36. The time duration between dub and lub in a cardiac cycle- A) 0.8 sec. B) 0.3 sec. C) 0.5 sec. D) 0.1 sec. Show Answer Correct Answer: C) 0.5 sec. 37. Weight of adult human heart is: A) 250-300gm. B) 200-250gm. C) 300-350gm. D) 350-400gm. Show Answer Correct Answer: A) 250-300gm. 38. A person can receive blood only from a donor of his/ her blood group if the blood group of this person is- A) O. B) A, B, AB, or O. C) A or B. D) AB. Show Answer Correct Answer: A) O. 39. The other name of Lymph is A) Tissue Fluid. B) Middle man of the body. C) Interstitial fluid. D) All of the above. Show Answer Correct Answer: D) All of the above. 40. Left side of the heart is high in A) N. B) CO2. C) H. D) O2. Show Answer Correct Answer: D) O2. 41. Which condition is characterized by persistently elevated arterial blood pressure that can damage the heart, brain, and kidneys? A) Angina pectoris. B) Heart failure. C) Hypertension. D) Atherosclerosis. Show Answer Correct Answer: C) Hypertension. 42. What does an electrocardiogram (ECG) measure? A) Blood flow. B) Oxygen levels. C) Blood pressure. D) Heart electrical activity. Show Answer Correct Answer: D) Heart electrical activity. 43. Which chamber of the heart receives deoxygenated blood? A) Left atrium. B) Left ventricle. C) Right ventricle. D) Right atrium. Show Answer Correct Answer: D) Right atrium. 44. (1) Arteries are thick-walled and have narrow lumen as compared to veins(2) Angina is acute chest pain when the blood circulation to the brain is reduced(3) Persons with blood group AB can donate blood to any person with any blood group under the ABO system(4) Calcium ions play a very important role in blood clotting.Which two of the above statements are correct? A) And (4). B) And (2). C) And (3). D) And (4). Show Answer Correct Answer: A) And (4). 45. Which of the following blood groups is a universal recipient in blood transfusion? A) Group A. B) Group AB. C) Group O. D) Group B. Show Answer Correct Answer: B) Group AB. 46. Which human blood group system classifies types based on the presence or absence of A and B surface antigens on RBCs? A) Rh system. B) HLA system. C) ABO system. D) MN system. Show Answer Correct Answer: C) ABO system. 47. First heart sound is A) Lubb sound at the beginning of ventrical systole. B) Dup sound at the end of systole. C) Lubb sound at the end of systole. D) Dup sound at the beginning of ventrical systole. Show Answer Correct Answer: A) Lubb sound at the beginning of ventrical systole. 48. Blood of AB group cannot be given to B group patient because A) Patient has antibodies B. B) Patient has antibodies A. C) Patient lacks antibodies A. D) Patient lacks antibodies B. Show Answer Correct Answer: B) Patient has antibodies A. 49. ''when the heart muscle is suddenly damaged by an inadequate blood supply" Describe Disorder is- A) ANGINA PECTORIS. B) HEART ATTACK. C) CARDIAC ARREST. D) HEART FAILURE. Show Answer Correct Answer: B) HEART ATTACK. 50. Which blood vessels have the thinnest walls, allowing for the exchange of nutrients and gases with tissues? A) Capillaries. B) Veins. C) Arteries. D) Venules. Show Answer Correct Answer: A) Capillaries. 51. If liver is removed, the component that increases in blood A) Urea. B) Uric acid. C) Ammonia. D) Protein. Show Answer Correct Answer: C) Ammonia. 52. What is the role of fibrinogen in blood? A) Clotting of blood. B) Defense mechanism. C) Regulation of blood pressure. D) Transport of oxygen. Show Answer Correct Answer: A) Clotting of blood. 53. ASSERTION (A):Leucocytes are also called white blood cellsREASON (R):Leucocytes lack haemoglobin A) Both A and R are true and R is correct explanation of A. B) Both A and R are true and R is not correct explanation of A. C) A is true R is false. D) A is false R is true. Show Answer Correct Answer: A) Both A and R are true and R is correct explanation of A. 54. Which protein in plasma is essential for blood clotting? A) Globulin. B) Fibrinogen. C) Hemoglobin. D) Albumin. Show Answer Correct Answer: B) Fibrinogen. 55. How Erythroblastosis foetalis (Haemolytic diseases of the new born) can be avoided? A) By administering anti-rh-antibodies to mother after first delivery. B) By administering rh-antigen to mother after first delivery. C) By administering anti-rh-antigen to mother after first delivery. D) By administering rh-antibodies to mother after first delivery. Show Answer Correct Answer: A) By administering anti-rh-antibodies to mother after first delivery. 56. S 1-The formation of Thrombokinase is a cascade process.S 2-Thrombin converts fibrin into Fibrinogen. A) S 1 and S 2 are true. B) S 1 and S 2 are false. C) S 1 is true but S 2 is false. D) S 1 is false but S 2 is true. Show Answer Correct Answer: C) S 1 is true but S 2 is false. 57. The valve present between Left Ventricle and Aorta is- A) Mitral valve. B) Tricuspid valve. C) Semilunar valve. D) Bicuspid valve. Show Answer Correct Answer: C) Semilunar valve. 58. Which term do not apply to human heart: A) Four chambered. B) Pacemaker. C) Neurogenic. D) Mitral valve. Show Answer Correct Answer: C) Neurogenic. 59. What is the primary component of blood plasma? A) Water. B) Electrolytes. C) Hormones. D) Proteins. Show Answer Correct Answer: A) Water. 60. Clumping of RBC may occur when blood of one person is mixed with serum or blood of another person. This is due to A) Antitoxin-antibody reaction. B) Antibody-antibody reaction. C) Antigen-antigen reaction. D) Antigen-antibody reaction. Show Answer Correct Answer: D) Antigen-antibody reaction. 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