NCERT Class 11-Biology: Chapter – 18 Body Fluids and Circulation Part 2 (For CBSE, ICSE, IAS, NET, NRA 2023)

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Question 10:

The cells involved in inflammatory reactions are

a. Basophils

b. Neutrophils

c. Eosinophils

d. Lymphocytes

Answer: (a)

Question 11:

The second heart sound (dubb) is associated with the closure of

a. Tricuspid valve

b. Semilunar valves

c. Bicuspid valve

d. Tricuspid and bicuspid valves.

Answer: (b)

Question 12:

Which of the following correctly explains a phase/event in cardiac cycle in a standard electrocardiogram?

a. QRS complex indicates atrial contraction.

b. QRS complex indicates ventricular contraction.

c. Time between S and T represents atrial systole.

d. P-wave indicates beginning of ventricular contraction.

Answer: (b)

Question 13:

Which of the following statements is incorrect?

a. A person of ‘O’ blood group has anti ‘A’ and anti ‘B’ antibodies in his blood plasma.

b. A person of ‘B’ blood group can՚t donate blood to a person of ‘A’ blood group.

c. Blood group is designated on the basis of the presence of antibodies in the blood plasma.

d. A person of AB blood group is universal recipient.

Answer: (c)

Question 14:

What would be the cardiac output of a person having 72 heart beats per minute and a stroke volume of ?





Answer: (b)

Question 15:

Match the terms given under Column ‘A’ with their functions given under Column ‘B’ and select the answer from the options given below:

Match the Terms
Column AColumn B
A.Lymphatic Systemi.Carries oxygenated blood
B.Pulmonary veinii.Immune Response
C.Thrombocytesiii.To drain back the tissue fluid to the circulatory system
D.Lymphocytesiv.Coagulation of blood


a. A-ii, B-i, C-iii, D-iv

b. A-iii, B-i, C-iv, D-ii

c. A-iii, B-i, C-iii, D-iv

d. A-ii, B-i, C-iii, D-iv

Answer: (b)

Question 16:

Read the following statements and choose the correct option

Statement 1: Atria receive blood from all parts of the body which subsequently flows to ventricles.

Statement 2: Action potential generated at sino-atrial node passes from atria to ventricles.

a. Action mentioned in Statement 1 is dependent on action mentioned in Statement 2

b. Action mentioned in Statement 2 is dependent on action mentioned in Statement 1

c. Action mentioned in Statements 1 and 2 are independent of each other.

d. Action mentioned in Statements 1 and 2 are synchronous.

Answer: (b)

Very Short Answer Type Questions

Question 1:

Name the blood component which is viscous and straw coloured fluid.


Plasma which constitutes about of blood and allows blood cells to float in it.