CBSE Class 11 Biology Body Fluids and Circulation Assignments

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