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Body Fluids and Circulation - XI

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Which of the following cells are the most abundant of all the cells in blood?

  1. Leucocytes

  2. Eosinophils

  3. Neutrophils

  4. Erthrocytes

  5. Basophils


Correct Option: D
Explanation:

This is the correct option. Erthrocytes are the most abundant of all the cells in blood. 

Which of the following is not a property of erythrocytes?

  1. In most mamals, they are devoid of nucleus.

  2. They have a red-coloured iron containing protein.

  3. They have an average life-span of 120 days.

  4. They are biconcave in shape.

  5. They are produced from megakaryocytes.


Correct Option: E
Explanation:

This is the correct option as this is not a property of erythrocytes. In adults, erythrocytes are produced in the red bone marrow.

Which of the following statements is/are false?

a. Sponges and coelenterates circulate water from their surroundings through their body cavities. b. Plasma is a viscous fluid that constitutes nearly 90 percent of the blood. c. Leucocytes are colourless as they lack haemoglobin.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c


Correct Option: C
Explanation:

This is the correct option as this statement is false. Plasma is a viscous fluid that constitutes nearly 55 percent of the blood.

Which of the following belong to the granulocytes category?

a. Lymphocytes b. Monocytes c. Eosinophils d. Basophils

  1. Only a and c

  2. Only a and b

  3. Only a and d

  4. Only c and d

  5. Only b and c


Correct Option: D
Explanation:

This is the correct option. Eosinophils and basophils belong to the granulocytes category.

Which of the following are phagocytic cells that destroy foreign organisms entering the body?

a. Neutrophils b. Monocytes c. Basophils d. Eosinophils

  1. Only a and b

  2. Only a and c

  3. Only c and d

  4. Only a and d

  5. Only b and c


Correct Option: A
Explanation:

This is the correct option. Neutrophils and monocytes are the phagocytic cells that destroy foreign organisms entering the body.

Circulatory patterns are of two types. Which of the following have an open circulatory system?

a. Arthropods b. Annelids c. Molluscs d. Chordates

  1. Only a and b

  2. Only a and c

  3. Only a and d

  4. Only b and d

  5. Only b and c


Correct Option: B
Explanation:

This is the correct option as arthropods and molluscs have an open circulatory system. 

Which of the following is not a property of the lymph?

  1. It is a carrier of hormones.

  2. It contains lymphocytes that are responsible for the immune response of the body.

  3. Calcium ions present in it play a very important role in clotting of blood.

  4. It is an important carrier of nutrients.

  5. Fats are absorbed through it.


Correct Option: C
Explanation:

This is the correct option as this is not a property of lymph. Lymph does not have calcium ions in it.

Match the following:

 
Names of proteins Functions
a. Fibrinogens 1. They help in maintaining the osmotic balance.
b. Globulins 2. They are primarily involved in defence mechanisms of the body.
c. Albumins 3. They are needed for coagulation of blood.
  1. a - 3, b - 2, c - 1

  2. a - 3, b - 1, c - 2

  3. a - 1, b - 3, c - 2

  4. a - 2, b - 3, c - 1

  5. a - 1, b - 2, c - 3


Correct Option: A
Explanation:

This is the correct option. Fibrinogens are needed for coagulation of blood. Globulins are primarily involved in defence mechanisms of the body. Albumins help in maintaining the osmotic balance.

Which of the following statements is/are false?

a. An 'O' blood group person is a universal donor as group 'O' blood can be donated to persons with any other blood group. b. Blood normally contains 1,500,00-3,500,00 platelets mm–3. c. Basophils are the most abundant cells of the total WBCs and neutrophils are the least.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c


Correct Option: E
Explanation:

This is the correct option as this statement is false.

Which of the following animals possess double circulation?

a. Fishes b. Birds c. Mammals d. Amphibians

  1. Only a and b

  2. Only b and c

  3. Only a and c

  4. Only a and d

  5. Only b and d


Correct Option: B
Explanation:

This is the correct option as birds and mammals possess double circulation.

The human heart is of the size of a clenched fist. The two relatively small upper chambers are called

  1. atria

  2. ventricles

  3. vena cava

  4. aorta

  5. pericardium


Correct Option: A
Explanation:

This is the correct option. The two relatively small upper chambers are called atria.

Which of the following statements is/are false?

a. Hypertension is caused due to deposits of calcium, fat, cholesterol and fibrous tissues, that makes the lumen of arteries narrower. b. Parasympathetic neural signals decrease the rate of heartbeat. c. The depolarisation of atria leads to the contraction of both the atria.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c


Correct Option: A
Explanation:

This is the correct option as this statement is false. The depolarisation of atria leads to the contraction of both the atria.

Match the following:

 
Blood group Antibodies in plasma
a. A 1. Nil
b. AB 2. anti-B
c. O 3. anti-A, -B
  1. a - 1, b - 3, c - 2

  2. a - 2, b - 3, c - 1

  3. a - 2, b - 1, c - 3

  4. a - 1, b - 2, c - 3

  5. a - 3, b - 1, c - 2


Correct Option: C
Explanation:

This is the correct option. A person having blood group A has anti-B antibodies in his plasma. A person having blood group AB has nil antibodies in his plasma. A person having blood group O has anti-A, -B antibodies in his plasma.

Two prominent sounds lubb and dubb are produced during each cardiac cycle. The first heart sound is associated with the closure of which of the following?

a. Tricuspid valves b. Bicuspid valves c. Semilunar valves

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c


Correct Option: B
Explanation:

This is the correct option. The first heart sound is associated with the closure of the tricuspid and bicuspid valves.

Match the following:

 
a. Fishes 1. They have a 2-chambered heart with an atrium and a ventricle.
b. Amphibians 2. They have a 4-chambered heart with two atria and two ventricles.
c. Mammals 3. They have a 3-chambered heart with two atria and a single ventricle.
  1. a - 1, b - 2, c - 3

  2. a - 2, b - 1, c - 3

  3. a - 3, b - 1, c - 2

  4. a - 1, b - 3, c - 2

  5. a - 2, b - 3, c - 1


Correct Option: D
Explanation:

This is the correct option. Fishes have a 2-chambered heart with an atrium and a ventricle. Amphibians have a 3-chambered heart with two atria and a single ventricle. Mammals have a 4-chambered heart with two atria and two ventricles.

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