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NCERT Exemplar · Class 11 · Biology

Chapter 18: Body Fluids and Circulation

Practice each question, then open the answer or worked solution.

MULTIPLE CHOICE QUESTIONS

16 questions
Q11Written answer

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.Solution:

Option (b) is the answer.

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Worked solution

Solution coming soon.

Q12Written answer

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

in a standard electrocardiogram?

a. QRS complex indicates atrial contraction.

b. QRS complex indicates ventricular contraction.

c. The time between S and T represents atrial systole.

d. P-wave indicates the beginning of ventricular contraction.

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Worked solution

Option (b) is the answer.

Q13Written answer

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 based on the presence of antibodies

in the blood plasma.

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

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Worked solution

Option (c) is the answer.

Q14Written answer

What would be the cardiac output of a person having 72 heartbeats per

minute and a stroke volume of 50 ml?

a. 360 mL

b. 3600 mL

c. 7200 mL

d. 5000 mL

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Worked solution

Option (b) is the answer.

Q15Written answer

Match the terms given under Column ‘A’ with their functions given under

Column ‘B’ and select the answer from the options given below:

Column I Column II

A. Lymphatic System

B. Pulmonary vein

C. Thrombocytes

D. Lymphocytes iv.

Column II

i. Carries oxygenated blood

ii. Immune Response

iii. To drain back the tissue fluid

to the circulatory system

iv. Coagulation of blood

Options:

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

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Worked solution

Option (b) is the answer.

Q16Written answer

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 the 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 is independent of each

other.

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

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Worked solution

Option (b) is the answer.