MCQ Questions Chapter 18 Body Fluids and Circulation Class 11 Biology

Please refer to MCQ Questions Chapter 18 Body Fluids and Circulation Class 11 Biology with answers provided below. These multiple-choice questions have been developed based on the latest NCERT book for class 11 Biology issued for the current academic year. We have provided MCQ Questions for Class 11 Biology for all chapters on our website. Students should learn the objective based questions for Chapter 18 Body Fluids and Circulation in Class 11 Biology provided below to get more marks in exams.

Chapter 18 Body Fluids and Circulation MCQ Questions

Please refer to the following Chapter 18 Body Fluids and Circulation MCQ Questions Class 11 Biology with solutions for all important topics in the chapter.

MCQ Questions Answers for Chapter 18 Body Fluids and Circulation Class 11 Biology

Question- In arteriosclerosis
(a) arterial walls become very thin and weak so that the blood oozes out of the walls.
(b) sex linked heredity is involved.
(c) blood coagulates even in the arteries.
(d) arterial walls become inelastic and thickened.

Question- Bulk of carbon dioxide (CO₂) released from body tissues into the blood is present as 
(a) 70% carbamino-haemoglobin and 30% as bicarbonate
(b) carbamino-haemoglobin in RBCs
(c) bicarbonate in blood plasma and RBCs
(d) free CO₂in blood plasma

Question- In a standard ECG, which one of the following alphabets is the correct representation of the respective activity of the human heart?
(a) P-Depolarization of the atria
(b) R-Repolarization of ventricles
(c) S-Start of systole
(d) T-End of diastole

Question- Find out the incorrect statement from the following.
(a) Veins are typically larger in diameter than arteries.
(b) Because of their small size, capillaries contain blood that is moving more quickly than in other parts of the circulatory system.
(c) The walls of arteries are elastic, enabling them to stretch and shrink during changes in blood pressure.
(d) Veins contain more blood than any other part of the circulatory system.

Question- If a person is loosing blood continuously due to injury then what will be the effect on his pulse and BP initially?
(a) Pulse and BP both will fall.
(b) Pulse will fall and BP will rise.
(c) Both pulse and BP will rise.
(d) Pulse will rise and BP will fall.

Question- Which one of the following statements is correct regarding blood pressure?
(a) 190/110 mmHg may harm vital organs like brain and kidney.
(b) 130/90 mmHg is considered high and requires treatment.
(c) 120/80 mmHg is considered an ideal blood pressure.
(d) 105/50 mmHg makes one very active.

Question- With reference to the blood in a normal person, which one of the following statements is correct? 
(a) Compared to arteries, veins are less numerous and hold less of the body’s blood at any given time.
(b) Blood cells constitute about 70 percent of the total volume of the blood.
(c) White blood cells (WBC) are made by lymph nodes only.
(d) The blood has more platelets than WBC.

Question- Which of the following organs is the blood bank? 
(a) Heart
(b) Lungs
(c) Spleen
(d) Liver

Question- Cardiac output is/are
(i) Product of heart rate and stroke volume.
(ii) Product of auricular and ventricular volume.
(iii) A process in which blood pumped in one minute.
Which of the above statements is true ?
(a) Only (i)
(b) Only (ii)
(c) Both (i) and (ii)
(d) Both (i) and (iii)

Question- Which of the following statements is correct regarding joint diastole?
(a) Both atria relax but ventricles contract.
(b) Both ventricles relax but atria contract.
(c) Both semilunar valves are open.
(d) Tricuspid and bicuspid valves are open.

Question- Which one of the statement is correct with reference to the circulation of blood in a mammal?
(a) Left auricle receives oxygenated blood.
(b) Pulmonary artery carries oxygenated blood to the lungs.
(c) Blood from the lungs is returned to heart through 2-veins, one from each lung.
(d) None of the above.

Question- Which of the following statement is correct regarding lymph?
(a) It transports oxygen to brain.
(b) It transport CO₂to lungs.
(c) It returns interstitial fluid to blood.
(d) It returns RBCs and WBCs to lymph nodes.

Question- What happens when the pacemaker becomes nonfunctional?
(a) Only the auricles will contract rhythmically.
(b) The cardiac muslces do not contract in a coordinated manner rhythmically.
(c) Only ventricles will contract rhythmically.
(d) Auricles and ventricles contract simultaneously.

Question- Which of the following statement is correct regarding blood cells?
(a) A healthy individual has 12 – 16 gms of haemoglobin in every 200ml of blood.
(b) RBC as an average life span of 120 days after which they are destroyed in the spleen.
(c) Neutrophils and basophils are phagocytic cells which destroy foreign organisms entering the body.
(d) A reduction in the number of WBC leads to clotting disorders which will lead to excessive loss of blood from the body

Question- In which of the following options the types of heart is correctly matched to their respective group of animals?
(a) Two chambered heart- Fishes and amphibians
(b) Three chambered heart- Amphibians and birds
(c) Four chambered heart- Birds and mammals
(d) Three chambered heart- Reptiles and mammals

Question- Which of the following blood group can be given to any patient ? 
(a) A
(b) B
(c) O
(d) AB

Question- Which one of the following is a matching pair?
(a) Lubb-Sharp closure of AV valves at the beginning of ventricular systole.
(b) Dup-Sudden opening of semilunar valves at the beginning of ventricular diastole.
(c) Pulsation of the radial artery-Valves in the blood vessels.
(d) Purkinje fibres-Initiation of the heart beat.

Question- Thickening of arteries due to cholesterol deposition is 
(a) arteriosclerosis
(b) rheumatic heart
(c) blood pressure
(d) cardiac arrest.

Question- Match the following descriptions (given in column-II) of each type of blood cell to their names (given in column-I).
Column-I                   Column-II
(Blood cell)               (Description)
A. Erythrocyte          I. Most abundant white blood cell, and the main phagocytic cell of the blood.
B. Eosinophil            II. Least abundant white blood cell; releases histamine granules.
C. Lymphocyte         III. Resist infections and are associated with allergic reactions.
D. Neutrophil           IV. Blood cell that contains haemoglobin and transports oxygen.
E. Basophil              V. Specialized antibodyproducing white blood cells.
(a) A – IV; B – III; C – V; D – I; E – II
(b) A – I; B – II, C – III; D – IV; E – V
(c) A – II; B – III; C – I; D – V; E – IV
(d) A – IV; B – I; C – II; D – III; E – V

Question- What is true about RBCs in humans?
(a) They carry about 20–25 per cent of CO₂.
(b) They transport 99.5 per cent of O₂.
(c) They transport about 80 per cent oxygen only and the rest 20 per cent of it is transported in dissolved state in blood plasma.
(d) They do not carry CO₂at all.

Question- Match each area of the heart (column-I) with the structure (column-II) from which it receives blood.
Column-I                         Column-II
(Area of heart)           (Receives blood from)
A. Right atrium            I. Left atrium
B. Right ventricle         II. Vena cavae
C. Left atrium              III. Right atrium
D. Left ventricle           IV. Pulmonary veins
(a) A – II; B – III; C – IV; D – I
(b) A – I; B – II; C – III; D – IV
(c) A – IV; B – I; C – II; D – III
(d) A – III; B – IV; C – I; D – II

Question- Match the column I with column II and choose the correct answer from the option given below.
Column-I                          Column -II
A. Cardiac cycle               I. 72 / min
B. Plasma                        II. 120/80 mmHg
C. Systolic/Diastolic       III. 0.8 seconds
D. Haemoglobin              IV. 12 -16 gms in every 100 ml of blood
E. Heart beat                   V. 55 % of the blood
(a) A – I; B – II; C – III; D – IV; E – V
(b) A – III; B – V; C – II; D – IV; E – I
(c) A – III; B – I; C – V; D – II; E – IV
(d) A – V; B – IV; C – III; D – I; E – II

Question- If nerves of heart are cut, then heart will
(a) beat rhythmically
(b) stop
(c) beat arhythmically
(d) shrink

Question- A malfunction of the lymph nodes would most likely interfere with the
(a) release of carbon dioxide into the lymph
(b) filtering of glucose from the lymph
(c) release of oxygen into the lymph
(d) filtering of bacteria from the lymph

Question- Which one of the following will be the cardiac output (in litres per minute) of a heart that has a stroke volume of 0.07 litres and is beating at a rate of 90 per minute?
(a) 63.30
(b) 63.00
(c) 00. 63
(d) 06.30

Question- Which of the following statements is/are correct for blood group?
(i) Blood group O is universal donor.
(ii) Blood group AB is universal acceptor.
(iii) Blood group A contains antigen B and anti-A antibodies.
(iv) Blood group B contains antigen B and anti-A antibodies.
(a) Only (i) and (ii).
(b) Only (i), (ii) and (iii).
(c) Only (i), (ii) and (iv).
(d) Only (i), (iii) and (iv).

Question- Maximum amount of oxygen is lost from the blood in the
(a) capillaries surrounding the tissue cells.
(b) arteries of the body.
(c) capillaries surrounding the alveoli.
(d) left auricle of the heart.

Question- Which of the folowing statement best defines artery?
(a) It carries blood from one visceral organ to another visceral organ.
(b) It carries oxygenated blood to the different organs.
(c) It carries blood away from the heart to different organs.
(d) It breaks up into capillaries which reunite to form a vein.

Question- A drop of each of the following, is placed separately on four slides. Which of them will not coagulate?
(a) Whole blood from pulmonary vein
(b) Blood plasma
(c) Blood serum
(d) Sample from the thoracic duct of lymphatic system

Question- Which of the following term (column-I) is correctly matched with its functions (column-II)?
Column-I              Column-II
(Term)                (Functions)
(a) Plasma          Straw coloured fluid that consists of suspended blood cells
(b) Heart             Site where exchange of nutrients and gases occur
(c) Capillary         A red colour fluid that provides food to the cells
(d) Blood             Pumping station of the body

Question- Which of the following set of events can occur simultaneously?
(a) Auricular depolarization, ventricular depolarization,auricular systole.
(b) Ventricular depolarization, auricular systole,ventricular diastole.
(c) Auricular depolarization, ventricular repolarization,auricular diastole.
(d) Auricular depolarizaion, ventricular diastole,auricular systole.

Question- The blood returning to the heart through pulmonary vein has more
(a) RBC
(b) haemoglobin
(c) oxygen
(d) nutrient

Question- During systemic circulation, blood leaves the ___(i)____ and _________(ii)______.
(a) (i)- left ventricle, (ii)- goes directly to the aorta
(b) (i)- right ventricle, (ii)- goes directly to the aorta
(c) (i)- right ventricle, (ii)- moves to the lungs.
(d) (i)- left ventricle, (ii)- moves to the lungs

Question- Which of the following statements is correct regarding pulmonary artery ?
(a) It carries deoxygenated blood from heart to lungs.
(b) It carries deoxygenated blood from lungs to heart.
(c) It carries oxygenated blood from heart to lungs.
(d) It carries oxygenated blood from lungs to heart.

Question- Anti-serum contains 
(a) antigens
(b) antibodies
(c) leucocytes
(d) RBCs

Question- Which enzyme induces lysis of fibrinogen to fibrin during fibrinolysis ? 
(a) Plasmin
(b) Thrombin
(c) Fibrin
(d) Trypsin

Question- Which one of the following is a matching pair of a certain body feature and its value/count in a normal human adult? 
(a) Urea 5-10 mg / 100 ml of blood
(b) Blood sugar (fasting) – 70-100 mg/100 ml
(c) Total blood volume – 5-6
(d) ESR in Wintrobe method – 9-15 mm in males and 20-34 mm in female

Question- Which of the following chamber of heart has the thickest muscular wall ? 
(a) Left auricle
(b) Left ventricle
(c) Right ventricle
(d) Right auricle

Question- If due to some injury, the chordae tendinae 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 pulmonary artery will be reduced.
(b) The flow of blood into the aorta will be slowed down.
(c) The ‘pacemaker’ will stop working.
(d) The blood will tend to flow back into the left atrium.

Question- First heart sound (LUBB) coincides with which wave of ECG?
(a) R-wave
(b) T-wave
(c) P-wave
(d) Q-wave

Question- An artificial pace maker is implanted subcutaneously and connected to the heart in patients 
(a) having 90% blockage of the three main coronary arteries.
(b) having a very high blood pressure.
(c) with irregularity in the heart rhythm.
(d) suffering from arteriosclerosis.

Question- Hirudin is
(a) A protein produced by Hordeum vulgare,which is rich in lysine.
(b) A toxic molecule isolated from Gossypium hirusutum, which reduces human fertility.
(c) A protein produced from transgenic Brassica napus, which prevents blood clotting.
(d) An antibiotic produced by a genetically engineered bacterium, Escherichia coli.

Question- The component of blood which prevents its coagulation in the blood vessels is 
(a) haemoglobin
(b) plasma
(c) thrombin
(d) heparin

Question- Which one of the following is a matching pair?
(a) Lubb – Sharp closure of AV valves at the beginning of ventricular systole.
(b) Dup – Sudden opening of semilunar valves at the beginning of ventricular diastole.
(c) Pulsation of the radial artery valves in the blood vessels.
(d) Purkinje fibres-Initiation of the heart beat.

Question- In normal human blood pressure, what does the “120” represent?
(a) The maximum pressure that can be sustained by the arteries before bursting.
(b) The lowest pressure in the arteries that will keep someone from fainting when they stand up.
(c) The highest ideal arterial pressure for someone at rest.
(d) The pressure in the veins.

Question- Arteries supplying blood to the heart are called
(a) carotid arteries
(b) hepatic arteries
(c) coronary arteries
(d) pulmonary arteries

Question- A man whose blood group is not known meets with a serious accident and needs blood transfusion immediately, which one of the blood groups readily available in the hospital will be safe for transfusion? 
(a) O, Rh^–
(b) O, Rh⁺
(c) AB, Rh^–
(d) AB, Rh⁺

Question- Mark the incorrect statement regarding normal ECG.
(a) Patient is connected to 3 electrical leads (one to each wrist and to the left ankle).
(b) ‘T’ wave represents atrial repolarization.
(c) Q marks the beginning of ventricular systole.
(d) R represents ventricular depolarization.

Question- In which of the following pairs the two items mean one and the same thing? 
(a) Malleus – Anvil
(b) SA node – Pace maker
(c) Leucocytes – Lymphocytes
(d) Haemophilia – Blood cancer

Question- Which of the following statements are wrong?
(i) Leucocytes disintegrate in the spleen and liver.
(ii) RBC, WBC and blood platelets are produced by bone marrow.
(iii) Neutrophils bring about destruction and detoxification of toxins of protein origin.
(iv) The important function of lymphocytes is to produce antibodies.
(a) (i) and (ii) only
(b) (i) and (iv) only
(c) (i) and (iii) only
(d) (ii) and (iii) only

Question- Given below are four statements (a-d) regarding human blood circulatory system
(i) Arteries are thick-walled and have narrow lumen as compared to veins.
(ii) Angina is acute chest pain when the blood circulation to the brain is reduced.
(iii) Persons with blood group AB can donate blood to any person with any blood group under ABO system.
(iv) Calcium ions play a very important role in blood clotting.
Which two of the above statements are correct?
(a) (i) & (iv)
(b) (i) & (ii)
(c) (ii) & (iii)
(d) (iii) & (iv)

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