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11th Standard English Medium Biology (Zoology) Subject Body Fluids and Circulation Book Back 3 Mark Questions with Solution updated Book back Questions

Published on: 13/05/2022

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Std: 11th Standard - Biology

chapter: - Book back Questions

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Questions:

Generic 3

3 x 3 = 9

What are the heart sounds? When and how are these sounds produced?

What is lymph? Write its function.

Which of these functions could or could not be carried out by a red blood cell? Briefly justify your answer.
a. Protein synthesis
b. Cell division
c. Lipid synthesis
d. Active transport

(a)

Protein synthesis

(b)

Cell division

(c)

Lipid synthesis

(d)

Active transport

Generic 2

2 x 2 = 4

What might be the effect on a person whose diet has less iron content?

Distinguish between arteries and veins.

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Answers Key:

Generic 3

3 x 3 = 9

There are usually two heart sounds they are
(i) 'lub' sound: It is the 1^st sound produced by the closure of atrio ventricular valves (both tricuspid and bicuspid valves).
(ii) 'dub' sound: It is the 2^nd sound produced by the closure of semilunar valves (both pulmonary aortic valves).
(iii) A 3^rd abnormal sound may be produced with vibrations as "murmuring" under the dis-order of heart.

(i) The colourless fluid tissue circulated within the body is lymph.
(ii) A large number of lymphocytic cell concentrations in various lymphoid organs help to maintain immunity and disposal of cell debris.
(iii) Lacteals of lymphatic system absorb and transport some substances like fatty acids, glycerol, and vitamins A, D, E & K.

Reason : None of these functions can be carried out by RBC. Red Blood Cells (RBC) contain haemoglobin pigment and play a major role in transport of respiratory gases.

Generic 2

2 x 2 = 4

If a person diet does not contain iron, the synthesis of haemoglobin is lowered in bone marrow because each haemoglobin consists of 4 iron atoms to accept 4 O2

S.No. Arteries veins 1. Transport oxygenated blood except
pulmonary artery Transport deoxygenated blood except
pulmonary vein 2. Deeply seated Superficially seated 3. Branches of aorta Branches of venacavae 4. Have no valves Abdominal veins have only valves 5. Transports blood away from the heart Transport blood towards the heart 6. Walls are thicker Wall are thinner 7. Blood samples may rarely be taken Blood samples may be usually taken 8. Lumen is narrow Lumen is wider 9. Exhibit systolic pressure Exhibit diastolic pressure