Q. No.Platelets are cell fragments that:
I. are produced from megakaryocytes in the spleen in fetal life
II. can release variety of factors involved in blood coagulation
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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What would be true for the white blood cell shown in the given diagram?
1. They differentiate into phagocytic cells
2. They secrete histamine and heparin in the blood
3. They are responsible for providing adaptive immunity in vertebrates
4. Their number is increased in acute bacterial infections
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An Rh –ve person, when exposed to Rh +ve blood:
1. will form antibodies against the Rh antigen
2. will be unaffected
3. will form antibodies against the Rh antigen only on second exposure
4. will receive anti Rh antibodies from the donor
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Identify the incorrectly matched pair:
1. Plasma protein – 6 to 8 %
2. Formed elements – 55% of the blood
3. Hemoglobin – 12 to 16 gm in 100 ml of blood
4. Platelets – 150000 to 350000 mm-3
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When anti B antibodies are present in the plasma and A antigens on the surface of RBCs of a person, her blood group can be:
| 1. A and AB | 2. Only A |
| 3. Only B | 4. O |
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Which of the following would not be normal in a healthy human being?
1. A cells/blood ratio of 45%
2. A plasma albumin concentration of 4%
3. An RBC count of 5.2 million mm-3
4. A hemoglobin level of 15 gram per liter
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The least common of WBCs in the human blood are:
| 1. Eosinophils | 2. Lymphocytes |
| 3. Neutrophils | 4. Basophils |
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A. The number of I is increased in worm infestations and II secretes histamine and heparin in the blood.
B. III plays a vital role in acquired immunity.
C. The number of IV is significantly reduced in acute bacterial infections.
| 1. Only B | 2. Only A and B |
| 3. Only C | 4. A, B and C |
The enzyme that activates fibrinogens in the blood is:
| 1. | Thromboplastin | 2. | Thrombokinase |
| 3. | Thrombin | 4. | Plasmin |
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Which of the following can be called as a ‘cascade’ process?
1. Micturition reflex
2. Formation of cross bridges in skeletal muscle contraction
3. Coagulation of blood
4. Regulation of respiration
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