Read and download the CBSE Class 11 Biology Body Fluids and Circulation Assignments for the 2025-26 academic session. We have provided comprehensive Class 11 Biology school assignments that have important solved questions and answers for Chapter 15 Body Fluids And Circulation. These resources have been carefuly prepared by expert teachers as per the latest NCERT, CBSE, and KVS syllabus guidelines.
Solved Assignment for Class 11 Biology Chapter 15 Body Fluids And Circulation
Practicing these Class 11 Biology problems daily is must to improve your conceptual understanding and score better marks in school examinations. These printable assignments are a perfect assessment tool for Chapter 15 Body Fluids And Circulation, covering both basic and advanced level questions to help you get more marks in exams.
Chapter 15 Body Fluids And Circulation Class 11 Solved Questions and Answers
Ques. Cells formed in bone marrow include
(a) RBCs
(b) RBCs and leucocytes
(c) leucocytes
(d) lymphocytes.
Answer: B
Ques. Component of blood responsible for producing antibodies is
(a) thrombocytes
(b) monocytes
(c) erythrocytes
(d) lymphocytes.
Answer: D
Ques. Blood group AB has
(a) no antigen
(b) no antibody
(c) neither antigen nor antibody
(d) both antigen and antibody.
Answer: B
Ques. Carbonic anhydrase occurs in
(a) lymphocytes
(b) blood plasma
(c) RBCs
(d) leucocytes.
Answer: C
Ques. Removal of calcium from freshly collected blood would
(a) cause delayed clotting
(b) prevent clotting
(c) cause immediate clotting
(d) prevent destruction of haemoglobin
Answer: B
Ques. A person with blood group A requires blood. The blood group which can be given is
(a) A and B
(b) A and AB
(c) A and O
(d) A, B, AB and O.
Answer: C
Ques. Which one engulfs pathogens rapidly?
(a) Acidophils
(b) Monocytes
(c) Basophils
(d) Neutrophils
Answer: D
Ques. Child death may occur in the marriage of
(a) Rh+ man and Rh+ woman
(b) Rh+ man and Rh– woman
(c) Rh– man and Rh– woman
(d) Rh– man and Rh+ woman.
Answer: B
Ques. Breakdown product of haemoglobin is
(a) bilirubin
(b) iron
(c) biliverdin
(d) calcium.
Answer: A
Ques. RBCs do not occur in
(a) frog
(b) cow
(c) camel
(d) cockroach.
Answer: D
Ques. Which one of the following is correct?
(a) Lymph = Plasma + RBC + WBC
(b) Blood = Plasma + RBC + WBC + Platelets
(c) Plasma = Blood – Lymphocytes
(d) Serum = Blood + Fibrinogen
Answer: B
Ques. Compared to blood our lymph has
(a) plasma without proteins
(b) more WBCs and no RBCs
(c) more RBCs and less WBCs
(d) no plasma.
Answer: B
Ques. Which of the following statements is true for lymph?
(a) WBC + serum
(b) Blood – RBCs and some proteins
(c) RBCs + WBCs + plasma
(d) RBCs + proteins + platelets
Answer: B
Ques. Which of the following is not the main function of lymph glands?
(a) Forming RBCs
(b) Destroying bacteria
(c) Forming WBCs
(d) Forming antibodies
Answer: A
Ques. The lymph serves to
(a) return the interstitial fluid to the blood
(b) return the WBCs and RBCs to the lymph nodes
(c) transport CO2 to the lungs
(d) transport O2 to the brain.
Answer: A
Ques. Lymph differs from blood in possessing
(a) only WBC
(b) more RBC and WBC
(c) more RBC and few WBC
(d) more WBC and few RBC.
Answer: A
Ques. The QRS complex in a standard ECG represents
(a) repolarisation of auricles
(b) depolarisation of auricles
(c) depolarisation of ventricles
(d) repolarisation of ventricles.
Answer: C
Ques. Match the column - I with column - II.
Column-I Column-II
(A) P-wave (i) Depolarisation of ventricles
(B) QRS complex (ii) Repolarisation of ventricles
(C) T-wave (iii) Coronary ischaemia
(D) Reduction in the (iv) Depolarisation of atria
size of T- wave
(v) Repolarisation of atria
Select the correct option.
(A) (B) (C) (D)
(a) (ii) (iii) (v) (iv)
(b) (iv) (i) (ii) (iii)
(c) (iv) (i) (ii) (v)
(d) (ii) (i) (v) (iii)
Answer: B
Ques. 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) 125 beats per minute
(b) 50 beats per minute
(c) 75 beats per minute
(d) 100 beats per minute
Answer: D
Ques. Match the items given in column I with those in column II and select the correct option given below.
Column I Column II
A. Tricuspid valve (i) Between left atrium and left ventricle
B. Bicuspid valve (ii) Between right ventricle and pulmonary artery
C. Semilunar valve (iii) Between right atrium and right ventricle
A B C
(a) (iii) (i) (ii)
(b) (i) (iii) (ii)
(c) (i) (ii) (iii)
(d) (ii) (i) (iii)
Answer: A
Ques. Doctors use stethoscope to hear the sounds 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 in of blood from atria
(d) Semilunar valves close down after the blood flows into vessels from ventricles.
Answer: D
Ques. Blood pressure in the mammalian aorta is maximum during
(a) systole of the left ventricle
(b) diastole of the right atrium
(c) systole of the left atrium
(d) diastole of the right ventricle.
Answer: A
Ques. ‘Bundle of His’ is a part of which one of the following organs in humans?
(a) Brain
(b) Heart
(c) Kidney
(d) Pancreas
Answer: D
Ques. If due to some injury the chordae tendinae of the tricuspid valve of the human heart is partially nonfunctional, what will be the immediate effect?
(a) The flow of blood into the aorta will be slowed down.
(b) The ‘pacemaker’ will stop working.
(c) The blood will tend to flow back into the left atrium.
(d) The flow of blood into the pulmonary artery will be reduced.
Answer: D
Ques. In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart?
(a) S - start of systole
(b) T - end of diastole
(c) P - depolarisation of the atria
(d) R - repolarisation of ventricles
Answer: C
Ques. In humans, blood passes from the post caval to the diastolic right atrium of heart due to
(a) stimulation of the sino auricular node
(b) pressure difference between the post caval and atrium
(c) pushing open of the venous valves
(d) suction pull.
Answer: B
Ques. Which one of the following has an open circulatory system?
(a) Octopus
(b) Pheretima
(c) Periplaneta
(d) Hirudinaria
Answer: C
Ques. Bundle of His is a network of
(a) muscle fibres distributed throughout the heart walls
(b) muscle fibres found only in the ventricle wall
(c) nerve fibres distributed in ventricles
(d) nerve fibres found throughout the heart.
Answer: B
Solve the MCQ questions below
| Option | Meaning |
| (1) A | Both Assertion and Reason are true, and the Reason is the correct explanation for the Assertion. |
| (2) B | Both Assertion and Reason are true, but the Reason is NOT the correct explanation for the Assertion. |
| (3) C | The Assertion is true, but the Reason is false. |
| (4) D | Both the Assertion and the Reason are false. |
Question. Assertion :- Myocardial Ischaemia common among persons having CAD (coronary artery diseases).
Reason :- Due to CAD there is insufficient \( O_2 \) supply to heart muscles.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Heart failure some time called congestive heart failure.
Reason :- Congestion of the lungs is one of the main symptoms of this disease.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Human heart is myogenic.
Reason :- Human heart capable of generating a cardiac contraction indepentent of nervous input.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Sympathetic nervous system increases cardiac output.
Reason :- It can increase the heart beat rate and strength of ventricular contraction.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Blood of Periplaneta is not responsible for transportation of respiratory gases.
Reason :- Haemolymph does not contain respiratory pigment.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Plasma contains 92% of water.
Reason :- Albumin provides the colloid osmotic pressure.
(a) A
(b) B
(c) C
(d) D
Answer: B
Question. Assertion :- Neutrophills are granulocyte WBCs.
Reason :- All Granulocyte WBCs have dimorphic nucleus.
(a) A
(b) B
(c) C
(d) D
Answer: C
Question. Assertion :- Human heart is surrounded by white fibrous connective tissue.
Reason :- Left ventricle is thickest chamber of heart.
(a) A
(b) B
(c) C
(d) D
Answer: B
Question. Assertion :- RBCs responsible for transportation of \( CO_2 \) from tissue to lungs.
Reason :- Carbonic anhydrase is fastest catalyst in RBCs.
(a) A
(b) B
(c) C
(d) D
Answer: B
Question. Assertion :- All the veins carry deoxygenated blood to the Atria of heart.
Reason :- Heart pump oxygenated blood into pulmonary artery.
(a) A
(b) B
(c) C
(d) D
Answer: D
Question. Assertion :- The left ventricle gives rise to an ascending aorta from which the oxygenated blood is pumped to coronary arteries and systemic circulation of body.
Reason :- Pulmonary aorta receives deoxygenated blood from ventricle.
(a) A
(b) B
(c) C
(d) D
Answer: B
Question. Assertion :- Blood pumped to ventricles do not enter back to atria.
Reason :- Chordae tendinae present in the wall of heart, hold the valves of heart.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Heart shows rhythmic contraction and relaxation in specific sequence.
Reason :- Human heart is myogenic organ.
(a) A
(b) B
(c) C
(d) D
Answer: B
Question. Assertion :- The impulse travels all along the ventricles via bundle branches.
Reason :- Purkinje fibres spread throughout the ventricle wall.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Complete heartbeat consists of a systole and diastole of both atria & ventricles.
Reason :- The human heart beats at the rate of about 70-75 per minute in resting condition.
(a) A
(b) B
(c) C
(d) D
Answer: B
Question. Assertion :- High blood pressure cause haemorrhage and infarction in brain and heart.
Reason :- Calcium salts precipitate plaques, makes the wall of arteries stiff and rigid.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- QRS complex express ventricular depolarisation in ECG.
Reason :- Depolarisation occurs due to influx of \( Na^+ \) ions causes generation of action potential.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Lymphatic system provides immunity to body to fight against pathogen.
Reason :- Antigens are foreign particles and not harmful to us.
(a) A
(b) B
(c) C
(d) D
Answer: C
Question. Assertion :- Heart failure is the same as cardiac arrest.
Reason :- In heart failure heart stop beating.
(a) A
(b) B
(c) C
(d) D
Answer: D
Question. Assertion :- SA node is pacemaker of heart.
Reason :- It can initiate and maintain rhythmic contraction of heart.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Heparin is an anticoagulant present in our blood, prevent coagulation.
Reason :- \( Ca^{++} \) is essential factor for clotting.
(a) A
(b) B
(c) C
(d) D
Answer: B
Question. Assertion :- Mammals have double circulation of blood.
Reason :- Mammals have pulmonary and systemic circulation.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Blood group are decided on the basis of antigen present on R.B.C.
Reason :- Blood plasma have anti-antigen type of antibody.
(a) A
(b) B
(c) C
(d) D
Answer: B
Question. Assertion :- Cardiac output of an athlete will be much higher than that of an ordinary man during excercise.
Reason :- They have altered the stroke volume as well as the heart rate and thereby the cardiac output.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Blood is a special connective tissue.
Reason :- Blood consist of a fluid matrix and formed elements and some fibres.
(a) A
(b) B
(c) C
(d) D
Answer: C
Question. Assertion :- Fibrinogen, globulins are the major plasma proteins.
Reason :- Most of the plasma proteins are synthesised by liver.
(a) A
(b) B
(c) C
(d) D
Answer: B
Question. Assertion :- Plasma without the clotting factors is called serum.
Reason :- Blood clotting help in homeostasis.
(a) A
(b) B
(c) C
(d) D
Answer: B
Question. Assertion :- RBCs are the most abundant formed elements is blood.
Reason :- A healthy individual has 12-16 mgs of haemoglobin in every 100 ml of blood.
(a) A
(b) B
(c) C
(d) D
Answer: C
Question. Assertion :- Leucocytes are also known as white blood cells.
Reason :- They are without haemoglobin.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Basophils are involved in inflammatory reactions.
Reason :- Basophils secretes histamine, serotonin, heparin.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- O negative group individual are called universal donors.
Reason :- O negative blood can be donated to persons with any other blood group.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Erythroblastosis foetalis can be avoided by administering anti Rh antibodies.
Reason :- Anti Rh antibodies will trapped the Rh positive RBCs in mother's blood.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Calcium ions play a very important role in blood clotting.
Reason :- Thrombin is an enzyme.
(a) A
(b) B
(c) C
(d) D
Answer: B
Question. Assertion :- Lymph is colourless fluid.
Reason :- Lymph is without most abundant formed elements.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- All vertebrates possess a muscular chambered heart.
Reason :- All vertebrates possess closed circulatory system.
(a) A
(b) B
(c) C
(d) D
Answer: B
Question. Assertion :- Right atrio-ventricular valve is called tricuspid valve.
Reason :- It is formed of three muscular flaps or cusps.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- The valves in the heart allows the flow of blood only in one direction.
Reason :- Any backward flow produces extra heart sound.
(a) A
(b) B
(c) C
(d) D
Answer: B
Question. Assertion :- Left ventricle has thickest myocardium.
Reason :- Left ventricle pumps the blood into entire body.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Electrocardiogram is used to obtain an electrocardiograph.
Reason :- ECG is a graphical representation of the chemical activity of heart during a cardiac cycle.
(a) A
(b) B
(c) C
(d) D
Answer: D
Question. Assertion :- ECG has great clinical significance.
Reason :- The ECGs obtained from different individuals have roughly the same shape for a given lead configuration, any deviation from this shape indicates a possible abnormality or disease.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Normal activities of the heart are regulated intrinsically.
Reason :- Specialised muscles (Nodal tissue) present with in heart.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Adrenal medullary hormones can also increase the cardiac output.
Reason :- These hormone increase the rate of heart beat, the strength of ventricular contraction.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- Human have a complete double circulation.
Reason :- Two circulatory pathways, namely pulmonary and systemic are present.
(a) A
(b) B
(c) C
(d) D
Answer: A
Question. Assertion :- The state of heart when it is not pumping blood effectively enough to meet the need of the body known as heart failure.
Reason :- It is common among the women.
(a) A
(b) B
(c) C
(d) D
Answer: C
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CBSE Class 11 Biology Chapter 15 Body Fluids And Circulation Assignment
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